Dell Vostro 3490 User manual

Latitude 3490
Owner’s Manual
Regulatory Model: P89G
Regulatory Type: P89G001
September 2021
Rev. A02

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid
the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
© 2018 - 2019 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its
subsidiaries. Other trademarks may be trademarks of their respective owners.

Chapter 1: Working on your computer............................................................................................7
Safety precautions.............................................................................................................................................................. 7
Electrostatic discharge—ESD protection................................................................................................................7
ESD field service kit ..................................................................................................................................................... 8
Transporting sensitive components.......................................................................................................................... 9
Before working inside your computer.............................................................................................................................9
After working inside your computer................................................................................................................................9
Chapter 2: Disassembly and reassembly....................................................................................... 11
Recommended tools...........................................................................................................................................................11
Screw size list......................................................................................................................................................................11
SIM tray – optional............................................................................................................................................................ 12
Removing the SIM tray – WWAN models.............................................................................................................. 12
Installing the SIM tray – WWAN models................................................................................................................ 12
SD card.................................................................................................................................................................................13
Removing the SD card................................................................................................................................................ 13
Installing the SD card.................................................................................................................................................. 13
Base Cover.......................................................................................................................................................................... 13
Removing the base cover...........................................................................................................................................13
Installing base cover.................................................................................................................................................... 16
Battery..................................................................................................................................................................................16
Lithium-ion battery precautions............................................................................................................................... 16
Removing battery......................................................................................................................................................... 17
Installing the battery....................................................................................................................................................18
WLAN Card..........................................................................................................................................................................18
Removing the WLAN card..........................................................................................................................................18
Installing the WLAN card............................................................................................................................................19
WWAN card – optional.....................................................................................................................................................19
Removing the WWAN daughterboard.....................................................................................................................19
Installing the WWAN daughterboard...................................................................................................................... 20
VGA board...........................................................................................................................................................................20
Removing VGA board................................................................................................................................................. 20
Installing VGA board.................................................................................................................................................... 21
Memory Module..................................................................................................................................................................21
Removing the memory module................................................................................................................................. 21
Installing the memory module...................................................................................................................................22
Power button board..........................................................................................................................................................22
Removing power button board.................................................................................................................................22
Installing power button board...................................................................................................................................23
Heat sink..............................................................................................................................................................................23
Removing the heatsink...............................................................................................................................................23
Installing the heatsink.................................................................................................................................................25
System Fan......................................................................................................................................................................... 25
Removing the system fan..........................................................................................................................................25
Contents
Contents 3

Installing the system fan............................................................................................................................................26
M2. SATA Solid State Drive (SSD)............................................................................................................................... 27
Removing the M2. SSD card.....................................................................................................................................27
Installing the M2. SSD card.......................................................................................................................................27
Hard drive............................................................................................................................................................................28
Removing the hard disk drive ..................................................................................................................................28
Installing the hard disk drive ....................................................................................................................................30
Input-Output board, SD card and coin cell battery holder.......................................................................................31
Removing the Input-Output board, SD card and coin cell battery holder......................................................31
Installing the Input-Output board, SD card and coin cell battery holder....................................................... 32
Fingerprint reader – optional..........................................................................................................................................32
Removing the fingerprint reader..............................................................................................................................32
Installing the fingerprint reader................................................................................................................................34
Coin cell battery.................................................................................................................................................................34
Removing the coincell battery..................................................................................................................................34
Installing the coincell battery....................................................................................................................................35
Speakers..............................................................................................................................................................................35
Removing the speakers..............................................................................................................................................35
Installing the speakers................................................................................................................................................ 36
Touchpad panel..................................................................................................................................................................36
Removing the touchpad.............................................................................................................................................36
Installing the touchpad...............................................................................................................................................38
Display assembly................................................................................................................................................................39
Removing the display assembly............................................................................................................................... 39
Installing the display assembly..................................................................................................................................40
System board...................................................................................................................................................................... 41
Removing system board............................................................................................................................................. 41
Installing the system board....................................................................................................................................... 46
DC-In Port........................................................................................................................................................................... 47
Removing the DC-in port...........................................................................................................................................47
Installing the DC-in port............................................................................................................................................. 47
Display hinge cover........................................................................................................................................................... 48
Removing display hinge cover .................................................................................................................................48
Installing display hinge cover ...................................................................................................................................49
LCD Bezel............................................................................................................................................................................49
Removing the LCD bezel........................................................................................................................................... 49
Installing the LCD bezel............................................................................................................................................. 50
Camera.................................................................................................................................................................................50
Removing the camera................................................................................................................................................ 50
Installing the camera................................................................................................................................................... 51
LCD Panel............................................................................................................................................................................52
Removing the LCD panel........................................................................................................................................... 52
Installing the LCD Panel.............................................................................................................................................53
eDP and camera cable..................................................................................................................................................... 54
Removing the eDP and camera cable.....................................................................................................................54
Installing the eDP and camera cable.......................................................................................................................55
LCD Hinge...........................................................................................................................................................................56
Removing the LCD hinge...........................................................................................................................................56
Installing the LCD hinge............................................................................................................................................. 57
Palmrest...............................................................................................................................................................................57
4Contents

Removing the palmrest.............................................................................................................................................. 57
Chapter 3: Technical specifications.............................................................................................59
Processor ........................................................................................................................................................................... 59
Memory .............................................................................................................................................................................. 59
Storage specifications......................................................................................................................................................60
Audio specifications..........................................................................................................................................................60
Video specifications..........................................................................................................................................................60
Webcam specifications..................................................................................................................................................... 61
Wired communications......................................................................................................................................................61
Wireless communications ...............................................................................................................................................62
Ports and Connectors...................................................................................................................................................... 66
Display specifications....................................................................................................................................................... 67
Keyboards Hot Key Definitions..................................................................................................................................... 67
Function short cut keys............................................................................................................................................. 68
Touchpad.............................................................................................................................................................................68
Battery specifications...................................................................................................................................................... 69
Adapter options................................................................................................................................................................. 69
System dimensions .......................................................................................................................................................... 70
Security options ................................................................................................................................................................70
Operating conditions ....................................................................................................................................................... 70
Chapter 4: Technology and components...................................................................................... 72
Power adapter....................................................................................................................................................................72
DDR4.................................................................................................................................................................................... 72
USB features...................................................................................................................................................................... 73
Advantages of Displayport over USB Type-C...................................................................................................... 75
HDMI 1.4.............................................................................................................................................................................. 75
USB Type-C........................................................................................................................................................................76
Chapter 5: System setup options.................................................................................................77
BIOS overview....................................................................................................................................................................77
Entering BIOS setup program.........................................................................................................................................77
Navigation keys.................................................................................................................................................................. 77
One time boot menu......................................................................................................................................................... 77
System Setup overview................................................................................................................................................... 78
Accessing System Setup................................................................................................................................................. 78
General screen options.................................................................................................................................................... 78
System Configuration screen options.......................................................................................................................... 79
Video screen options........................................................................................................................................................80
Security screen options................................................................................................................................................... 80
Secure Boot screen options........................................................................................................................................... 82
Intel Software Guard Extensions screen options...................................................................................................... 83
Performance screen options.......................................................................................................................................... 83
Power management screen options............................................................................................................................. 83
POST behavior screen options...................................................................................................................................... 85
Virtualization support screen options...........................................................................................................................85
Wireless screen options................................................................................................................................................... 85
Maintenance screen options.......................................................................................................................................... 86
Contents 5

System logs screen options............................................................................................................................................ 86
SupportAssist system resolution................................................................................................................................... 86
Verifying system memory in system setup BIOS....................................................................................................... 87
Updating the BIOS............................................................................................................................................................ 87
Updating the BIOS in Windows................................................................................................................................ 87
Updating the BIOS in Linux and Ubuntu................................................................................................................ 87
Updating the BIOS using the USB drive in Windows..........................................................................................87
Updating the BIOS from the F12 One-Time boot menu.....................................................................................88
System and setup password...........................................................................................................................................88
Assigning a system setup password....................................................................................................................... 89
Deleting or changing an existing system setup password.................................................................................89
Clearing CMOS settings.................................................................................................................................................. 89
Clearing BIOS (System Setup) and System passwords.......................................................................................... 90
Chapter 6: Software.................................................................................................................... 91
Operating system configurations................................................................................................................................... 91
Downloading drivers.......................................................................................................................................................... 91
Chipset driver................................................................................................................................................................91
Serial IO driver.............................................................................................................................................................. 91
Graphics controller driver..........................................................................................................................................92
USB drivers................................................................................................................................................................... 92
Network drivers........................................................................................................................................................... 92
Realtek Audio................................................................................................................................................................93
Serial ATA drivers........................................................................................................................................................ 93
Security drivers............................................................................................................................................................93
Chapter 7: Troubleshooting......................................................................................................... 94
Handling swollen Lithium-ion batteries........................................................................................................................ 94
Dell SupportAssist Pre-boot System Performance Check diagnostics................................................................94
Running the SupportAssist Pre-Boot System Performance Check................................................................95
Built-in self-test (BIST)................................................................................................................................................... 95
M-BIST...........................................................................................................................................................................95
LCD Power rail test (L-BIST)................................................................................................................................... 96
LCD Built-in Self Test (BIST)................................................................................................................................... 96
Beep codes......................................................................................................................................................................... 96
Recovering the operating system................................................................................................................................. 96
Real Time Clock reset.......................................................................................................................................................97
Backup media and recovery options............................................................................................................................. 97
WiFi power cycle............................................................................................................................................................... 97
Drain residual flea power (perform hard reset)......................................................................................................... 98
Chapter 8: Contacting Dell.......................................................................................................... 99
6Contents

Working on your computer
Safety precautions
The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions.
Observe the following safety precautions before you perform any installation or break/fix procedures involving disassembly or
reassembly:
●Turn off the system and all attached peripherals.
●Disconnect the system and all attached peripherals from AC power.
●Disconnect all network cables, telephone, and telecommunications lines from the system.
●Use an ESD field service kit when working inside any notebook to avoid electrostatic discharge (ESD) damage.
●After removing any system component, carefully place the removed component on an anti-static mat.
●Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted.
Standby power
Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are
essentially powered while turned off. The internal power enables the system to be remotely turned on (wake on LAN) and
suspended into a sleep mode and has other advanced power management features.
Unplugging, pressing and holding the power button for 15 seconds should discharge residual power in the system board.
notebooks.
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done through
the use of a field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare
metal and never to a painted or non-metal surface. The wrist strap should be secure and in full contact with your skin, and
ensure that you remove all jewelry such as watches, bracelets, or rings prior to bonding yourself and the equipment.
Electrostatic discharge—ESD protection
ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards,
processors, memory DIMMs, and system boards. Very slight charges can damage circuits in ways that may not be obvious, such
as intermittent problems or a shortened product life span. As the industry pushes for lower power requirements and increased
density, ESD protection is an increasing concern.
Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than
in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.
Two recognized types of ESD damage are catastrophic and intermittent failures.
●Catastrophic – Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes
an immediate and complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has
received a static shock and immediately generates a "No POST/No Video" symptom with a beep code emitted for missing or
nonfunctional memory.
●Intermittent – Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of
intermittent failures means that most of the time when damage occurs, it is not immediately recognizable. The DIMM
receives a static shock, but the tracing is merely weakened and does not immediately produce outward symptoms related to
the damage. The weakened trace may take weeks or months to melt, and in the meantime may cause degradation of memory
integrity, intermittent memory errors, etc.
1
Working on your computer 7

The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded")
failure.
Perform the following steps to prevent ESD damage:
●Use a wired ESD wrist strap that is properly grounded. The use of wireless anti-static straps is no longer allowed; they do not
provide adequate protection. Touching the chassis before handling parts does not ensure adequate ESD protection on parts
with increased sensitivity to ESD damage.
●Handle all static-sensitive components in a static-safe area. If possible, use anti-static floor pads and workbench pads.
●When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti-static
packing material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that you
discharge static electricity from your body.
●Before transporting a static-sensitive component, place it in an anti-static container or packaging.
ESD field service kit
The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components:
anti-static mat, wrist strap, and bonding wire.
Components of an ESD field service kit
The components of an ESD field service kit are:
●Anti-Static Mat – The anti-static mat is dissipative and parts can be placed on it during service procedures. When using an
anti-static mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metal
on the system being worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly
on the mat. ESD-sensitive items are safe in your hand, on the ESD mat, in the system, or inside a bag.
●Wrist Strap and Bonding Wire – The wrist strap and bonding wire can be either directly connected between your wrist
and bare metal on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware that
is temporarily placed on the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD
mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never
use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone to damage from normal wear
and tear, and must be checked regularly with a wrist strap tester in order to avoid accidental ESD hardware damage. It is
recommended to test the wrist strap and bonding wire at least once per week.
●ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitored
kit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A
wrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with your
regional office to find out if they have one. To perform the test, plug the wrist-strap's bonding-wire into the tester while it is
strapped to your wrist and push the button to test. A green LED is lit if the test is successful; a red LED is lit and an alarm
sounds if the test fails.
●Insulator Elements – It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts
that are insulators and often highly charged.
●Working Environment – Before deploying the ESD Field Service kit, assess the situation at the customer location. For
example, deploying the kit for a server environment is different than for a desktop or portable environment. Servers are
typically installed in a rack within a data center; desktops or portables are typically placed on office desks or cubicles. Always
look for a large open flat work area that is free of clutter and large enough to deploy the ESD kit with additional space to
accommodate the type of system that is being repaired. The workspace should also be free of insulators that can cause an
ESD event. On the work area, insulators such as Styrofoam and other plastics should always be moved at least 12 inches or
30 centimeters away from sensitive parts before physically handling any hardware components
●ESD Packaging – All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shielded
bags are preferred. However, you should always return the damaged part using the same ESD bag and packaging that the
new part arrived in. The ESD bag should be folded over and taped shut and all the same foam packing material should be
used in the original box that the new part arrived in. ESD-sensitive devices should be removed from packaging only at an
ESD-protected work surface, and parts should never be placed on top of the ESD bag because only the inside of the bag is
shielded. Always place parts in your hand, on the ESD mat, in the system, or inside an anti-static bag.
●Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts
to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.
8Working on your computer

ESD protection summary
It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static
mat at all times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all
insulator parts while performing service and that they use anti-static bags for transporting sensitive components.
Transporting sensitive components
When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place
these parts in anti-static bags for safe transport.
Lifting equipment
Adhere to the following guidelines when lifting heavy weight equipment:
CAUTION: Do not lift greater than 50 pounds. Always obtain additional resources or use a mechanical lifting
device.
1. Get a firm balanced footing. Keep your feet apart for a stable base, and point your toes out.
2. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load.
3. Lift with your legs, not your back.
4. Keep the load close. The closer it is to your spine, the less force it exerts on your back.
5. Keep your back upright, whether lifting or setting down the load. Do not add the weight of your body to the load. Avoid
twisting your body and back.
6. Follow the same techniques in reverse to set the load down.
Before working inside your computer
1. Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.
2. Turn off your computer.
3. If the computer is connected to a docking device (docked), undock it.
4. Disconnect all network cables from the computer (if available).
CAUTION: If your computer has an RJ45 port, disconnect the network cable by first unplugging the cable
from your computer.
5. Disconnect your computer and all attached devices from their electrical outlets.
6. Open the display.
7. Press and hold the power button for few seconds, to ground the system board.
CAUTION: To guard against electrical shock unplug your computer from the electrical outlet before
performing Step # 8.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by
periodically touching an unpainted metal surface at the same time as touching a connector on the back
of the computer.
8. Remove any installed ExpressCards or Smart Cards from the appropriate slots.
After working inside your computer
After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning
on your computer.
CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do
not use batteries designed for other Dell computers.
1. Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.
Working on your computer 9

2. Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the
computer.
3. Connect your computer and all attached devices to their electrical outlets.
4. Turn on your computer.
10 Working on your computer

Disassembly and reassembly
Recommended tools
The procedures in this document require the following tools:
●Phillips #0 screwdriver
●Phillips #1 screwdriver
●Plastic scribe
NOTE: The #0 screw driver is for screws 0-1 and the #1 screw driver is for screws 2-4
Screw size list
Table 1. Screw size list
Component M2x2 M2x3 M2x4 M2.5x2.5 M2.5x5 M2x5.5 M3x3 2.0D 0.8+2.2L K
Hinge Bracket L + R to LCD cover 10
LCD panel 4
TP Dome support bracket to palmrest 2
Touchpad panel 4
Heatsink 3
Type-C bracket to System board 1
HDD bracket to HDD Module 4
Dc-IN to palmrest 1
System board to palmrest 1
Power board to palmrest 1
VGA board to palmrest 2
WWAN board to palmrest 1
SD reader and coin cell battery holder 2
Hinge bracket L + R to palmrest 5
HDD bracket to palmrest 4
FAN to palmrest 2
2
Disassembly and reassembly 11

Table 1. Screw size list (continued)
Component M2x2 M2x3 M2x4 M2.5x2.5 M2.5x5 M2x5.5 M3x3 2.0D 0.8+2.2L K
Battery to palmrest 5
WLAN module to System board 1
WWAN module to WWAN board 1
SSD to palmrest 1
FP bracket to palmrest 1
SIM tray – optional
SIM tray is an optional component. You will see a SIM tray only in systems shipped with a WWAN card.
Removing the SIM tray – WWAN models
1. Follow the procedure Before working inside your computer
2. Open the SIM card slot cover on the right side of the system.
3. Insert the tip of a paperclip into the hole of the SIM tray slot and then pull out and remove the SIM tray.
Installing the SIM tray – WWAN models
1. Align and push the SIM tray back into the SIM tray slot.
2. Close the SIM card slot cover.
3. Follow the procedure in After working inside your computer
12 Disassembly and reassembly

SD card
Removing the SD card
1. Follow the procedure Before working inside your computer
2. Pull the SD card to remove it from the system.
Installing the SD card
1. Push the SD card into its slot until the SD card gets secured.
2. Follow the procedure in After working inside your computer
Base Cover
Removing the base cover
1. Follow the procedure in Before working inside your computer
2. Remove the SIM tray (WWAN models):
3. Remove the SD card
4. To remove the base cover:
a. Loosen the 10 M2.5xL8.5 captive screws that secure the base cover to the computer .
Disassembly and reassembly 13

b. Pry the base cover from the upper right edge [1] and continue to pry the outer edges of the base cover in clockwise
direction [2].
NOTE: You must use a plastic scribe to pry the base cover from the edge [1].
14 Disassembly and reassembly

5. Lift the right side and then the left side of the base cover.
NOTE: The VGA port and the plastic from the base cover, must lift right side (as shown in illustration) up at an angle
then release the left side in order to not get caught on the VGA port and damage either the base cover or VGA port.
Disassembly and reassembly 15

Installing base cover
1. Align the base cover with the screw holders on the computer.
2. Press the edges of the cover until it clicks into place.
3. Tighten the 10 M2.5xL8.5 screws to secure the base cover to the computer.
NOTE: Make sure while installing the base cover not to get caught on the VGA port and damage either the base cover
or VGA port.
4. Remove the SD card
5. Install the SIM tray (WWAN models).
6. Follow the procedure in After working inside your computer
Battery
Lithium-ion battery precautions
CAUTION:
●Exercise caution when handling Lithium-ion batteries.
●Discharge the battery as much as possible before removing it from the system. This can be done by
disconnecting the AC adapter from the system to allow the battery to drain.
●Do not crush, drop, mutilate, or penetrate the battery with foreign objects.
●Do not expose the battery to high temperatures, or disassemble battery packs and cells.
●Do not apply pressure to the surface of the battery.
●Do not bend the battery.
●Do not use tools of any kind to pry on or against the battery.
16 Disassembly and reassembly

●Ensure any screws during the servicing of this product are not lost or misplaced, to prevent accidental
puncture or damage to the battery and other system components.
●If a battery gets stuck in a device as a result of swelling, do not try to free it as puncturing, bending, or
crushing a Lithium-ion battery can be dangerous. In such an instance, contact for assistance and further
instructions.
●If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing,
bending, or crushing a lithium-ion battery can be dangerous. In such an instance, contact Dell technical
support for assistance. See https://www.dell.com/support.
●Always purchase genuine batteries from https://www.dell.com or authorized Dell partners and resellers.
Removing battery
1. Follow the procedure in Before working inside your computer.
2. Remove the:
a. Removing the SIM tray – WWAN models on page 12
b. base cover
3. To remove the battery:
a. Disconnect the battery cable from the connector on the system board .
b. Remove the 5 M2x3 screws that secure the battery to the computer [1].
NOTE: The 3-cell battery has only 3 screws.
c. Lift the battery away from the computer [2].
Disassembly and reassembly 17

Installing the battery
1. Insert the battery into the slot on the computer.
2. Replace the 5 M2x3 screws to secure the battery to the computer.
NOTE: The 3-cell battery has only 3 screws.
3. Connect the battery cable to the connector on the system board.
4. Install the:
a. base cover
b. SIM tray (WWAN models)
5. Follow the procedure in After working inside your computer.
WLAN Card
Removing the WLAN card
1. Follow the procedure in Before working inside your computer.
2. Remove the:
a. Removing the SIM tray – WWAN models on page 12
b. base cover
3. To remove the WLAN card:
a. Remove the M2x3 screw that secures the WLAN bracket to the system [1].
b. Slightly pull the bracket and lift it off the WLAN card [2].
c. Disconnect the WLAN antenna cables from the connectors on the WLAN card [3].
d. Pull the WLAN card from its connector on the system board [4].
18 Disassembly and reassembly

Installing the WLAN card
1. Insert the WLAN card into its connector on the system board.
2. Route the antenna cables on the wireless card slot and secure the antennas underneath the wireless card, and then connect
the two antenna cables to the connectors on the WLAN card.
NOTE: Connect the MAIN antenna (white) to the MAIN pin and AUX antenna (black) to the AUX pin, respectively.
3. Replace the WLAN bracket on the WLAN card.
4. Tighten the M2x3 screw to secure the WLAN card and card holder to the system board.
5. Install the:
a. base cover
b. SIM tray (WWAN models)
6. Follow the procedure in After working inside your computer
WWAN card – optional
Removing the WWAN daughterboard
1. Follow the procedure in Before working inside your computer.
2. Remove the:
a. Removing the SIM tray – WWAN models on page 12
b. base cover
3. To remove the WWAN card:
a. Remove the M2x3 screw that secures the WWAN metal bracket to the system [1] and then lift and remove the metal
bracket off the WWAN card [2].
b. Disconnect the two antenna cables from the WWAN card [3].
c. Pull out the WWAN card from its connector on the WWAN daughterboard [4].
Disassembly and reassembly 19

Installing the WWAN daughterboard
1. Insert the WWAN card into its connector on the WWAN daughterboard.
2. Connect the two antenna cables to the WWAN card.
NOTE: The WWAN antennas should be routed underneath the display cable and above the VGA daughter board cable,
and then secured with the adhesive tape on the palm-rest.
3. Replace the metal bracket on the WWAN.
4. Tighten the M2x3 screw to secure the WWAN card and bracket to the WWAN daughterboard.
5. Install the:
a.
b. base cover
c. Installing the SIM tray – WWAN models on page 12
6. Follow the procedure in After working inside your computer
VGA board
Removing VGA board
1. Follow the procedure in Before working inside your computer.
2. Remove the:
a. base cover
b. battery
3. To remove the VGA board:
a. Disconnect the VGA daughter board cable from the VGA daughter board [1].
b. Remove the two M2x3 screws that secure the VGA board to the system [2].
c. Lift the VGA board from the system [3].
20 Disassembly and reassembly