Dell Vostro 5390 User manual

Dell Vostro 5390
Service Manual
Regulatory Model: P114G
Regulatory Type: P114G001
September 2021
Rev. A01

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.
© 2019-2021 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........................................................................................... 6
Safety instructions.............................................................................................................................................................. 6
Turning off your computer — Windows 10...................................................................................................................6
Before working inside your computer............................................................................................................................. 7
After working inside your computer................................................................................................................................ 7
Chapter 2: Technology and components........................................................................................ 8
DDR4.......................................................................................................................................................................................8
HDMI 1.4................................................................................................................................................................................ 9
USB features.......................................................................................................................................................................10
Chapter 3: Removing and installing components.......................................................................... 13
Recommended tools..........................................................................................................................................................13
Screw list..............................................................................................................................................................................13
Base cover........................................................................................................................................................................... 14
Removing the base cover...........................................................................................................................................14
Installing the base cover.............................................................................................................................................14
Battery.................................................................................................................................................................................. 14
Removing the battery................................................................................................................................................. 14
Installing the battery....................................................................................................................................................14
Coin-cell battery.................................................................................................................................................................15
Removing the coin-cell battery.................................................................................................................................15
Installing the coin-cell battery...................................................................................................................................15
Solid-state drive................................................................................................................................................................. 16
Removing the M.2 2280 solid-state drive..............................................................................................................16
Installing the M.2 2280 solid-state drive................................................................................................................ 17
Removing the M.2 2230 solid-state drive..............................................................................................................18
Installing the M.2 2230 solid-state drive................................................................................................................18
Heat sink.............................................................................................................................................................................. 19
Removing the heat sink.............................................................................................................................................. 19
Installing the heat sink................................................................................................................................................ 19
Fan........................................................................................................................................................................................ 20
Removing the fan........................................................................................................................................................ 20
Installing the fan........................................................................................................................................................... 21
Speakers.............................................................................................................................................................................. 22
Removing the speakers..............................................................................................................................................22
Installing the speakers................................................................................................................................................ 23
WLAN card..........................................................................................................................................................................24
Removing the WLAN card.........................................................................................................................................24
Installing the WLAN card........................................................................................................................................... 24
WWAN card........................................................................................................................................................................ 25
Removing the WWAN card....................................................................................................................................... 25
Installing the WWAN card......................................................................................................................................... 26
Touchpad.............................................................................................................................................................................27
Contents
Contents 3

Removing the touchpad.............................................................................................................................................27
Installing the touchpad............................................................................................................................................... 27
Power-adapter port.......................................................................................................................................................... 27
Removing the power-adapter port..........................................................................................................................27
Installing the power-adapter port............................................................................................................................28
Display assembly................................................................................................................................................................28
Removing the display assembly............................................................................................................................... 28
Installing the display assembly..................................................................................................................................28
I/O board.............................................................................................................................................................................28
Removing the I/O board............................................................................................................................................28
Installing the I/O board.............................................................................................................................................. 29
Power-button board......................................................................................................................................................... 29
Removing the power-button board.........................................................................................................................29
Installing the power-button board...........................................................................................................................30
Power button with fingerprint reader.......................................................................................................................... 30
Removing the power button with fingerprint reader..........................................................................................30
Installing the power button with fingerprint reader.............................................................................................31
System board...................................................................................................................................................................... 31
Removing the system board......................................................................................................................................31
Installing the system board........................................................................................................................................ 31
Display bezel....................................................................................................................................................................... 32
Removing the display bezel.......................................................................................................................................32
Installing the display bezel.........................................................................................................................................32
Display panel....................................................................................................................................................................... 33
Removing the display panel.......................................................................................................................................33
Installing the display panel.........................................................................................................................................33
Display hinges.....................................................................................................................................................................33
Removing the display hinges.................................................................................................................................... 33
Installing the display hinges.......................................................................................................................................34
Camera.................................................................................................................................................................................34
Removing the camera.................................................................................................................................................34
Installing the camera...................................................................................................................................................34
Display back-cover............................................................................................................................................................35
Removing the display back-cover........................................................................................................................... 35
Installing the display back-cover............................................................................................................................. 35
Display cable.......................................................................................................................................................................35
Removing the display cable.......................................................................................................................................35
Installing the display cable.........................................................................................................................................36
Palm-rest and keyboard assembly................................................................................................................................ 36
Removing the palm-rest and keyboard assembly................................................................................................ 36
Installing the palm-rest and keyboard assembly.................................................................................................. 37
Chapter 4: BIOS setup.................................................................................................................38
BIOS overview....................................................................................................................................................................38
Entering BIOS setup program........................................................................................................................................ 38
Navigation keys..................................................................................................................................................................38
One time boot menu.........................................................................................................................................................39
System setup options.......................................................................................................................................................39
General options............................................................................................................................................................ 39
System information.....................................................................................................................................................40
4Contents

Video................................................................................................................................................................................41
Security...........................................................................................................................................................................41
Secure boot...................................................................................................................................................................42
Intel Software Guard Extensions.............................................................................................................................43
Performance................................................................................................................................................................. 43
Power management.................................................................................................................................................... 44
POST behavior............................................................................................................................................................. 44
Virtualization support................................................................................................................................................. 45
Wireless..........................................................................................................................................................................45
Maintenance screen....................................................................................................................................................46
System logs...................................................................................................................................................................46
SupportAssist System Resolution........................................................................................................................... 46
Updating the BIOS............................................................................................................................................................ 47
Updating the BIOS in Windows................................................................................................................................ 47
Updating the BIOS in Linux and Ubuntu................................................................................................................ 47
Updating the BIOS using the USB drive in Windows..........................................................................................47
Updating the BIOS from the F12 One-Time boot menu.....................................................................................48
System and setup password...........................................................................................................................................48
Assigning a system setup password....................................................................................................................... 49
Deleting or changing an existing system setup password.................................................................................49
Clearing CMOS settings.................................................................................................................................................. 49
Clearing BIOS (System Setup) and System passwords.......................................................................................... 50
Chapter 5: Troubleshooting......................................................................................................... 51
Handling swollen Lithium-ion batteries.........................................................................................................................51
Dell SupportAssist Pre-boot System Performance Check diagnostics................................................................52
Running the SupportAssist Pre-Boot System Performance Check................................................................52
Built-in self-test (BIST)................................................................................................................................................... 52
M-BIST...........................................................................................................................................................................52
LCD Power rail test (L-BIST)................................................................................................................................... 53
LCD Built-in Self Test (BIST)................................................................................................................................... 53
System-diagnostic lights................................................................................................................................................. 54
Real-Time Clock (RTC Reset)........................................................................................................................................54
Recovering the operating system................................................................................................................................. 55
Backup media and recovery options.............................................................................................................................55
WiFi power cycle............................................................................................................................................................... 55
Drain residual flea power (perform hard reset)......................................................................................................... 55
Chapter 6: Getting help and contacting Dell................................................................................ 57
Contents 5

Working on your computer
Topics:
•Safety instructions
•Turning off your computer — Windows 10
•Before working inside your computer
•After working inside your computer
Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless
otherwise noted, each procedure included in this document assumes that the following conditions exist:
●You have read the safety information that shipped with your computer.
●A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.
WARNING: Before working inside your computer, read the safety information that shipped with your computer.
For additional safety best practices information, see the Regulatory Compliance Homepage
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by
your warranty. Read and follow the safety instructions that came with the product.
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.
CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a
card by its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by
its pins.
CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some
cables have connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking
tabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending
any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and
aligned.
NOTE: Disconnect all power sources before opening the computer cover or panels. After you finish working inside the
computer, replace all covers, panels, and screws before connecting to the power source.
CAUTION: Exercise caution when handling Lithium-ion batteries in laptops. Swollen batteries should not be used
and should be replaced and disposed properly.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
Turning off your computer — Windows 10
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your
computer or remove the side cover.
1. Click or tap .
1
6 Working on your computer

2. Click or tap and then click or tap Shut down.
NOTE: Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not
automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds
to turn them off.
Before working inside your computer
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
After working inside your computer
CAUTION: Leaving stray or loose screws inside your computer may severely damage your computer.
1. Replace all screws and ensure that no stray screws remain inside your computer.
2. Connect any external devices, peripherals, or cables you removed before working on your computer.
3. Replace any media cards, discs, or any other parts that you removed before working on your computer.
4. Connect your computer and all attached devices to their electrical outlets.
5. Turn on your computer.
Working on your computer 7

Technology and components
NOTE: Instructions provided in this section are applicable on computers shipped with Windows operating system. Windows
is factory-installed with this computer.
Topics:
•DDR4
•HDMI 1.4
•USB features
DDR4
DDR4 (double data rate fourth generation) memory is a higher-speed successor to the DDR2 and DDR3 technologies and allows
up to 512 GB in capacity, compared to the DDR3's maximum of 128 GB per DIMM. DDR4 synchronous dynamic random-access
memory is keyed differently from both SDRAM and DDR to prevent the user from installing the wrong type of memory into the
system.
DDR4 needs 20 percent less or just 1.2 volts, compared to DDR3 which requires 1.5 volts of electrical power to operate. DDR4
also supports a new, deep power-down mode that allows the host device to go into standby without needing to refresh its
memory. Deep power-down mode is expected to reduce standby power consumption by 40 to 50 percent.
DDR4 Details
There are subtle differences between DDR3 and DDR4 memory modules, as listed below.
Key notch difference
The key notch on a DDR4 module is in a different location from the key notch on a DDR3 module. Both notches are on the
insertion edge but the notch location on the DDR4 is slightly different, to prevent the module from being installed into an
incompatible board or platform.
Figure 1. Notch difference
Increased thickness
DDR4 modules are slightly thicker than DDR3, to accommodate more signal layers.
2
8 Technology and components

Figure 2. Thickness difference
Curved edge
DDR4 modules feature a curved edge to help with insertion and alleviate stress on the PCB during memory installation.
Figure 3. Curved edge
Memory Errors
Memory errors on the system display the new ON-FLASH-FLASH or ON-FLASH-ON failure code. If all memory fails, the LCD
does not turn on. Troubleshoot for possible memory failure by trying known good memory modules in the memory connectors on
the bottom of the system or under the keyboard, as in some portable systems.
NOTE: The DDR4 memory is imbedded in board and not a replaceable DIMM as shown and referred.
HDMI 1.4
This topic explains the HDMI 1.4 and its features along with the advantages.
HDMI (High-Definition Multimedia Interface) is an industry-supported, uncompressed, all-digital audio/video interface. HDMI
provides an interface between any compatible digital audio/video source, such as a DVD player, or A/V receiver and a
compatible digital audio and/or video monitor, such as a digital TV (DTV). The intended applications for HDMI TVs, and DVD
players. The primary advantage is cable reduction and content protection provisions. HDMI supports standard, enhanced, or
high-definition video, plus multichannel digital audio on a single cable.
NOTE: The HDMI 1.4 will provide 5.1 channel audio support.
HDMI 1.4 Features
●HDMI Ethernet Channel - Adds high-speed networking to an HDMI link, allowing users to take full advantage of their
IP-enabled devices without a separate Ethernet cable
●Audio Return Channel - Allows an HDMI-connected TV with a built-in tuner to send audio data "upstream" to a surround
audio system, eliminating the need for a separate audio cable
●3D - Defines input/output protocols for major 3D video formats, paving the way for true 3D gaming and 3D home theater
applications
●Content Type - Real-time signaling of content types between display and source devices, enabling a TV to optimize picture
settings based on content type
●Additional Color Spaces - Adds support for additional color models used in digital photography and computer graphics
Technology and components 9

●4K Support - Enables video resolutions far beyond 1080p, supporting next-generation displays that will rival the Digital
Cinema systems used in many commercial movie theaters
●HDMI Micro Connector - A new, smaller connector for phones and other portable devices, supporting video resolutions up
to 1080p
●Automotive Connection System - New cables and connectors for automotive video systems, designed to meet the unique
demands of the motoring environment while delivering true HD quality
Advantages of HDMI
●Quality HDMI transfers uncompressed digital audio and video for the highest, crispest image quality.
●Low -cost HDMI provides the quality and functionality of a digital interface while also supporting uncompressed video
formats in a simple, cost-effective manner
●Audio HDMI supports multiple audio formats from standard stereo to multichannel surround sound
●HDMI combines video and multichannel audio into a single cable, eliminating the cost, complexity, and confusion of multiple
cables currently used in A/V systems
●HDMI supports communication between the video source (such as a DVD player) and the DTV, enabling new functionality
USB features
Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplified the connection between host computers and
peripheral devices like mice, keyboards, external drivers, and printers.
Let's take a quick look on the USB evolution referencing to the table below.
Table 1. USB evolution
Type Data Transfer Rate Category Introduction Year
USB 2.0 480 Mbps High Speed 2000
USB 3.0/USB 3.1 Gen
1
5 Gbps Super Speed 2010
USB 3.1 Gen 2 10 Gbps Super Speed 2013
USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)
For years, the USB 2.0 has been firmly entrenched as the de facto interface standard in the PC world with about 6 billion
devices sold, and yet the need for more speed grows by ever faster computing hardware and ever greater bandwidth demands.
The USB 3.0/USB 3.1 Gen 1 finally has the answer to the consumers' demands with a theoretically 10 times faster than its
predecessor. In a nutshell, USB 3.1 Gen 1 features are as follows:
●Higher transfer rates (up to 5 Gbps)
●Increased maximum bus power and increased device current draw to better accommodate power-hungry devices
●New power management features
●Full-duplex data transfers and support for new transfer types
●Backward USB 2.0 compatibility
●New connectors and cable
The topics below cover some of the most commonly asked questions regarding USB 3.0/USB 3.1 Gen 1.
Speed
Currently, there are 3 speed modes defined by the latest USB 3.0/USB 3.1 Gen 1 specification. They are Super-Speed, Hi-Speed
and Full-Speed. The new SuperSpeed mode has a transfer rate of 4.8Gbps. While the specification retains Hi-Speed, and
10 Technology and components

Full-Speed USB mode, commonly known as USB 2.0 and 1.1 respectively, the slower modes still operate at 480Mbps and 12Mbps
respectively and are kept to maintain backward compatibility.
USB 3.0/USB 3.1 Gen 1 achieves the much higher performance by the technical changes below:
●An additional physical bus that is added in parallel with the existing USB 2.0 bus (refer to the picture below).
●USB 2.0 previously had four wires (power, ground, and a pair for differential data); USB 3.0/USB 3.1 Gen 1 adds four more
for two pairs of differential signals (receive and transmit) for a combined total of eight connections in the connectors and
cabling.
●USB 3.0/USB 3.1 Gen 1 utilizes the bidirectional data interface, rather than USB 2.0's half-duplex arrangement. This gives a
10-fold increase in theoretical bandwidth.
With today's ever increasing demands placed on data transfers with high-definition video content, terabyte storage devices,
high megapixel count digital cameras etc., USB 2.0 may not be fast enough. Furthermore, no USB 2.0 connection could ever
come close to the 480Mbps theoretical maximum throughput, making data transfer at around 320Mbps (40MB/s) — the actual
real-world maximum. Similarly, USB 3.0/USB 3.1 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world
maximum rate of 400MB/s with overheads. At this speed, USB 3.0/USB 3.1 Gen 1 is a 10x improvement over USB 2.0.
Applications
USB 3.0/USB 3.1 Gen 1 opens up the laneways and provides more headroom for devices to deliver a better overall
experience. Where USB video was barely tolerable previously (both from a maximum resolution, latency, and video compression
perspective), it's easy to imagine that with 5-10 times the bandwidth available, USB video solutions should work that much
better. Single-link DVI requires almost 2Gbps throughput. Where 480Mbps was limiting, 5Gbps is more than promising. With its
promised 4.8Gbps speed, the standard will find its way into some products that previously weren't USB territory, like external
RAID storage systems.
Listed below are some of the available SuperSpeed USB 3.0/USB 3.1 Gen 1 products:
●External Desktop USB 3.0/USB 3.1 Gen 1 Hard Drives
●Portable USB 3.0/USB 3.1 Gen 1 Hard Drives
●USB 3.0/USB 3.1 Gen 1 Drive Docks & Adapters
●USB 3.0/USB 3.1 Gen 1 Flash Drives & Readers
●USB 3.0/USB 3.1 Gen 1 Solid-state Drives
●USB 3.0/USB 3.1 Gen 1 RAIDs
●Optical Media Drives
●Multimedia Devices
●Networking
●USB 3.0/USB 3.1 Gen 1 Adapter Cards & Hubs
Compatibility
The good news is that USB 3.0/USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0.
First of all, while USB 3.0/USB 3.1 Gen 1 specifies new physical connections and thus new cables to take advantage of the
higher speed capability of the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0
Technology and components 11

contacts in the exact same location as before. Five new connections to carry receive and transmitted data independently are
present on USB 3.0/USB 3.1 Gen 1 cables and only come into contact when connected to a proper SuperSpeed USB connection.
Windows 10 will be bringing native support for USB 3.1 Gen 1 controllers. This is in contrast to previous versions of Windows,
which continue to require separate drivers for USB 3.0/USB 3.1 Gen 1 controllers.
12 Technology and components

Removing and installing components
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Topics:
•Recommended tools
•Screw list
•Base cover
•Battery
•Coin-cell battery
•Solid-state drive
•Heat sink
•Fan
•Speakers
•WLAN card
•WWAN card
•Touchpad
•Power-adapter port
•Display assembly
•I/O board
•Power-button board
•Power button with fingerprint reader
•System board
•Display bezel
•Display panel
•Display hinges
•Camera
•Display back-cover
•Display cable
•Palm-rest and keyboard assembly
Recommended tools
The procedures in this document may require the following tools:
●Phillips #0 screwdriver
●Phillips #1 screwdriver
●Plastic scribe-Recommended for field technician
Screw list
The table provides the list of screws that are used for securing different components.
3
Removing and installing components 13

Base cover
Removing the base cover
1. Follow the procedure in Before working inside your computer.
The following image indicates the location of the base cover and provides a visual representation of the removal procedure.
1. Loosen the three captive screws on the base cover.
2. Remove the four screws (M2x6) that secure the base cover to the palm-rest and keyboard assembly.
3. Lift the base cover off the palm-rest and keyboard assembly.
Installing the base cover
If you are replacing a component, remove the existing component before performing the installation procedure.
The following image indicates the location of the base cover and provides a visual representation of the installation procedure.
1. Place the computer with the hinges facing towards you.
2. Align the base cover on the palm-rest and keyboard assembly, and snap the base cover into place.
3. Replace the four screws (M2x6) that secure the base cover to the palm-rest and keyboard assembly.
4. Tighten the three captive screws that secure the base cover to the palm-rest and keyboard assembly.
1. Follow the procedure in After working inside your computer.
Battery
Removing the battery
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
The following image indicates the location of the battery and provides a visual representation of the removal procedure.
1. Disconnect the battery cable from the system board.
2. Remove the screws (M2x2) that secure the battery to the palm-rest and keyboard assembly.
3. Remove the screw (M1.6x4) that secures the battery to the system board and palm-rest and keyboard assembly.
4. Lift the battery off the palm-rest and keyboard assembly.
Installing the battery
If you are replacing a component, remove the existing component before performing the installation procedure.
The following image indicates the location of the battery and provides a visual representation of the installation procedure.
1. Connect the battery cable to the system board.
2. Replace the screws (M2x2) that secure the battery to the palm-rest and keyboard assembly.
3. Replace the screw (M1.6x4) that secures the battery to the system board and palm-rest and keyboard assembly.
1. Install the base cover.
2. Follow the procedure in After working inside your computer.
14 Removing and installing components

Coin-cell battery
Removing the coin-cell battery
1. Follow the procedure in Before working inside your computer.
CAUTION: Removing the coin-cell battery resets the BIOS setup program’s settings to default. It is
recommended that you note the BIOS setup program’s settings before removing the coin-cell battery.
2. Remove the base cover.
3. Remove the battery.
The following image indicates the location of the coin-cell battery and provides a visual representation of the removal procedure.
1. Disconnect the coin-cell battery cable from the system board.
2. Remove the coin-cell battery cable from the routing guide.
3. Peel the coin-cell battery off the palm-rest and keyboard assembly.
Installing the coin-cell battery
If you are replacing a component, remove the existing component before performing the installation procedure.
The following image indicates the location of the coin-cell battery and provides a visual representation of the installation
procedure.
Removing and installing components 15

1. Adhere the coin-cell battery to the slot on the palm-rest and keyboard assembly.
2. Route the coin-cell battery cable through the routing guide.
3. Connect the coin-cell battery cable to the system board.
1. Install the battery.
2. Install the base cover.
3. Follow the procedure in After working inside your computer.
Solid-state drive
Removing the M.2 2280 solid-state drive
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Remove the battery.
The following image indicates the location of the solid-state drive and provides a visual representation of the removal procedure.
16 Removing and installing components

1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board.
2. Slide and remove the solid-state drive from the solid-state drive slot on the system board.
Installing the M.2 2280 solid-state drive
If you are replacing a component, remove the existing component before performing the installation procedure.
The following image indicates the location of the solid-state drive and provides a visual representation of the installation
procedure.
1. Align the notch on the solid-state drive with the tab on the solid-state drive slot and slide the solid-state drive into the
solid-state drive slot on the system board.
Removing and installing components 17

2. Replace the screw (M2x2.5) that secures the solid-state drive to the system board.
1. Install the battery.
2. Install the base cover.
3. Follow the procedure in After working inside your computer.
Removing the M.2 2230 solid-state drive
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Remove the battery.
The following image indicates the location of the solid-state drive and provides a visual representation of the removal procedure.
1. Remove the screw (M2x2.5) that secures the solid-state drive bracket to the system board.
2. Slide and remove the solid-state drive bracket off the solid-state drive on the system board.
3. Slide and remove the solid-state drive off the solid-state drive slot on the system board.
Installing the M.2 2230 solid-state drive
If you are replacing a component, remove the existing component before performing the installation procedure.
The following image indicates the location of the solid-state drive and provides a visual representation of the installation
procedure.
18 Removing and installing components

1. Align the notch on the solid-state drive with the tab on the solid-state drive slot and slide the solid-state drive into the
solid-state drive slot on the system board.
2. Slide the solid-state bracket on to the solid-state drive on the system board.
3. Replace the screw (M2x2.5) that secures the solid-state drive to the system board.
1. Install the battery.
2. Install the base cover.
3. Follow the procedure in After working inside your computer.
Heat sink
Removing the heat sink
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Remove the battery.
The following image indicates the location of the heat sink and provides a visual representation of the removal procedure.
1. Peel the mylar tape that secures the heat sink to the system board.
2. In the reverse sequential order (7>6>5>4>3>2>1), loosen the seven captive screws that secure the heat sink to the system
board.
3. Lift the heat sink off the system board.
Installing the heat sink
If you are replacing a component, remove the existing component before performing the installation procedure.
The following image indicates the location of the base cover and provides a visual representation of the installation procedure.
1. Align and place the screw holes on the heat sink with the screw holes on the system board.
2. In sequential order (as indicated on the heat sink), tighten the seven captive screws that secure the heat sink to the system
board.
3. Adhere the mylar tape that secures the heat sink to the system board.
Removing and installing components 19

1. Install the battery.
2. Install the base cover.
3. Follow the procedure in After working inside your computer.
Fan
Removing the fan
1. Follow the procedure in Before working inside your computer.
2. Remove the base cover.
3. Remove the battery.
The following image indicates the location of fan and provides a visual representation of the removal procedure.
1. Disconnect the I/O-board cable from the system board and I/O board.
NOTE: This step is only applicable for computers shipped with a WWAN configuration.
2. Remove the two (M2x3) screws that secure the fan to the system board.
3. Lift the fan slightly off the palm-rest and keyboard assembly.
4. Disconnect the fan cable from the system board and completely lift the fan off the palm-rest and keyboard assembly.
20 Removing and installing components