Dell Inspiron 14-7472 User manual

Inspiron 14 7000
Service Manual
Computer Model: Inspiron 14-7472
Regulatory Model: P74G
Regulatory Type: P74G001

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.
Copyright ©2017 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.
2017 - 09
Rev. A00

Contents
Before working inside your computer........................... 10
Before you begin .....................................................................................10
Safety instructions...................................................................................10
Recommended tools................................................................................. 11
Screw list................................................................................................. 12
After working inside your computer.............................. 14
Removing the base cover............................................. 15
Procedure................................................................................................ 15
Replacing the base cover..............................................17
Procedure................................................................................................ 17
Removing the battery...................................................18
Prerequisites............................................................................................ 18
Procedure................................................................................................ 18
Replacing the battery.................................................. 20
Procedure............................................................................................... 20
Post-requisites........................................................................................ 20
Removing the coin-cell battery.....................................21
Prerequisites............................................................................................ 21
Procedure................................................................................................22
3

Replacing the coin-cell battery.................................... 23
Procedure................................................................................................23
Post-requisites........................................................................................ 23
Removing the fan — for computer with integrated
graphics card............................................................... 24
Prerequisites............................................................................................24
Procedure................................................................................................24
Replacing the fan — for computer with integrated
graphics card............................................................... 27
Procedure................................................................................................27
Post-requisites.........................................................................................27
Removing the hard drive.............................................. 28
Prerequisites............................................................................................28
Procedure................................................................................................28
Replacing the hard drive............................................... 31
Procedure................................................................................................ 31
Post-requisites......................................................................................... 31
Removing the heat sink — for computer with
integrated graphics card.............................................. 32
Prerequisites............................................................................................32
Procedure................................................................................................32
Replacing the heat sink — for computer with
integrated graphics card.............................................. 34
Procedure................................................................................................34
Post-requisites........................................................................................ 34
4

Removing the heat-sink assembly — for computer
with discrete graphics card.......................................... 35
Prerequisites........................................................................................... 35
Procedure............................................................................................... 35
Replacing the heat-sink assembly — for computer
with discrete graphics card.......................................... 38
Procedure............................................................................................... 38
Post-requisites........................................................................................ 39
Removing the wireless card......................................... 40
Prerequisites........................................................................................... 40
Procedure............................................................................................... 40
Replacing the wireless card..........................................42
Procedure................................................................................................42
Post-requisites........................................................................................ 43
Removing the display assembly....................................44
Prerequisites............................................................................................44
Procedure................................................................................................44
Replacing the display assembly....................................48
Procedure............................................................................................... 48
Post-requisites........................................................................................ 48
Removing the I/O board...............................................49
Prerequisites........................................................................................... 49
Procedure............................................................................................... 49
5

Replacing the I/O board............................................... 51
Procedure................................................................................................ 51
Post-requisites......................................................................................... 51
Removing the memory module.....................................52
Prerequisites........................................................................................... 52
Procedure............................................................................................... 53
Replacing the memory module.....................................54
Procedure............................................................................................... 54
Post-requisites........................................................................................ 54
Removing the speakers................................................55
Prerequisites........................................................................................... 55
Procedure............................................................................................... 55
Replacing the speakers................................................ 57
Procedure................................................................................................57
Post-requisites........................................................................................ 57
Removing the status-light board..................................58
Prerequisites........................................................................................... 58
Procedure............................................................................................... 58
Replacing the status-light board.................................. 60
Procedure............................................................................................... 60
Post-requisites........................................................................................ 60
Removing the solid-state drive..................................... 61
Prerequisites............................................................................................ 61
Procedure................................................................................................ 61
6

Replacing the solid-state drive.....................................63
Procedure............................................................................................... 63
Post-requisites........................................................................................ 64
Removing the touchpad...............................................65
Prerequisites........................................................................................... 65
Procedure............................................................................................... 65
Replacing the touchpad............................................... 69
Procedure............................................................................................... 69
Post-requisites........................................................................................ 69
Removing the system board.........................................70
Prerequisites............................................................................................70
Procedure................................................................................................70
Replacing the system board......................................... 73
Procedure................................................................................................73
Post-requisites.........................................................................................74
Removing the power-adapter port............................... 75
Prerequisites............................................................................................75
Procedure................................................................................................75
Replacing the power-adapter port................................77
Procedure................................................................................................77
Post-requisites.........................................................................................77
Removing the palm rest and keyboard assembly.......... 78
Prerequisites............................................................................................78
Procedure................................................................................................79
7

Replacing the palm rest and keyboard assembly.......... 80
Procedure............................................................................................... 80
Post-requisites........................................................................................ 80
Downloading drivers.....................................................82
Downloading the audio driver.................................................................. 82
Downloading the graphics driver............................................................. 82
Downloading the USB 3.0 driver..............................................................83
Downloading the Wi-Fi driver.................................................................. 83
Downloading the media-card reader driver..............................................83
Downloading the chipset driver............................................................... 84
Downloading the network driver............................................................. 84
System setup...............................................................86
Boot Sequence....................................................................................... 86
Navigation keys.......................................................................................86
BIOS overview.........................................................................................87
Entering BIOS setup program.................................................................. 87
System setup options..............................................................................88
System and setup password....................................................................94
Assigning a system password and setup password............................95
Deleting or changing an existing system and or setup password....... 95
Clearing CMOS settings....................................................................96
Clearing forgotten passwords............................................................96
Troubleshooting........................................................... 97
Flashing the BIOS....................................................................................97
Flashing BIOS (USB key).........................................................................97
Enhanced Pre-Boot System Assessment (ePSA) diagnostics................. 98
8

Running the ePSA diagnostics.......................................................... 98
System diagnostic lights..........................................................................99
Flea power release.................................................................................100
Wi-Fi power cycle...................................................................................101
Getting help and contacting Dell.................................102
Self-help resources................................................................................ 102
Contacting Dell...................................................................................... 103
9

Before working inside your
computer
NOTE: The images in this document may dier from your computer
depending on the conguration you ordered.
Before you begin
1 Save and close all open les and exit all open applications.
2 Shut down your computer. Click Start → Power → Shut down.
NOTE: If you are using a dierent operating system, see the
documentation of your operating system for shut-down instructions.
3 Disconnect your computer and all attached devices from their electrical outlets.
4 Disconnect all attached network devices and peripherals, such as keyboard,
mouse, and monitor from your computer.
5 Remove any media card and optical disc from your computer, if applicable.
Safety instructions
Use the following safety guidelines to protect your computer from potential damage
and ensure your personal safety.
WARNING: Before working inside your computer, read the safety
information that shipped with your computer. For more safety best
practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
WARNING: Disconnect all power sources before opening the computer
cover or panels. After you nish working inside the computer, replace all
covers, panels, and screws before connecting to the electrical outlet.
CAUTION: To avoid damaging the computer, ensure that the work surface is
at and clean.
10

CAUTION: To avoid damaging the components and cards, handle them by
their edges, and avoid touching pins and contacts.
CAUTION: You should only perform troubleshooting and repairs as
authorized or directed by the Dell technical assistance team. Damage due to
servicing that is not authorized by Dell is not covered by your warranty. See
the safety instructions that shipped with the product or at www.dell.com/
regulatory_compliance.
CAUTION: Before touching anything inside your computer, ground yourself
by touching an unpainted metal surface, such as the metal at the back of
the computer. While you work, periodically touch an unpainted metal surface
to dissipate static electricity, which could harm internal components.
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
or thumb-screws that you must disengage before disconnecting the cable.
When disconnecting cables, keep them evenly aligned to avoid bending any
connector pins. When connecting cables, ensure that the ports and
connectors are correctly oriented and aligned.
CAUTION: Press and eject any installed card from the media-card reader.
Recommended tools
The procedures in this document may require the following tools:
• Phillips screwdriver #1
• Plastic scribe
11

Screw list
The following table provides the list of screws that are used for securing dierent
components to the palm rest and keyboard assembly.
Table 1. Screw list
Component Secured to Screw
type
Quanti
ty
Screw
image
Base cover Palm rest and
keyboard assembly
M2.5x5 7
Battery Palm rest and
keyboard assembly
M2x3 4
Display assembly (display hinge) Palm rest and
keyboard assembly
M2.5x5 4
Fan (for computer with
integrated graphics card)
Palm rest and
keyboard assembly
M2x3 2
Fan (for computer with discrete
graphics card)
Heat-sink assembly M2x3 3
Hard-drive bracket Palm rest and
keyboard assembly
M2x3 4
Hard drive Hard-drive bracket M3x3 4
Heat sink (for computer with
discrete graphics card)
System board M2x3 3
I/O board Palm rest and
keyboard assembly
M2x3 2
Power-adapter port Palm rest and
keyboard assembly
M2x3 1
Status-light board Palm rest and
keyboard assembly
M2x3 1
Solid-state drive Palm rest and
keyboard assembly
M3x3 1
12

Component Secured to Screw
type
Quanti
ty
Screw
image
System board Palm rest and
keyboard assembly
M2x3 3
Touch-pad bracket Palm rest and
keyboard assembly
M2x3 3
Touch pad Palm rest and
keyboard assembly
M2x2 4
Wireless-card bracket Palm rest and
keyboard assembly
M2x3 1
13

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.
14

Removing the base cover
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in Before
working inside your computer. After working inside your computer, follow
the instructions in After working inside your computer. For more safety best
practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
Procedure
1 Loosen the three captive screws that secure the base cover to the palm rest and
keyboard assembly.
2 Remove the seven screws (M2.5x5) that secure the base cover to the palm rest
and keyboard assembly.
15

3 Using your ngertips, pry the base cover o the palm rest and keyboard
assembly.
16

Replacing the base cover
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in Before
working inside your computer. After working inside your computer, follow
the instructions in After working inside your computer. For more safety best
practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
Procedure
1 Align the base cover with the palm rest and keyboard assembly and snap it into
place.
2 Replace the seven screws (M2.5x5) that secure the base cover to the palm rest
and keyboard assembly.
3 Tighten the three captive screws that secure the base cover to the palm rest
and keyboard assembly.
17

Removing the battery
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in Before
working inside your computer. After working inside your computer, follow
the instructions in After working inside your computer. For more safety best
practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
Prerequisites
Remove the base cover.
Procedure
1 Disconnect the battery cable from the system board.
2 Remove the four screws (M2x3) that secure the battery to the palm rest and
keyboard assembly.
18

3 Lift the battery o the palm rest and keyboard assembly.
4 Press and hold the power button for ve seconds to ground the system board.
19

Replacing the battery
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in Before
working inside your computer. After working inside your computer, follow
the instructions in After working inside your computer. For more safety best
practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
Procedure
1 Align the screw holes on the battery with the screw holes on the palm rest and
keyboard assembly.
2 Replace the four screws (M2x3) that secure the battery to the palm rest and
keyboard assembly.
3 Connect the battery cable to the system board.
Post-requisites
Replace the base cover.
20