Dell Inspiron 14 7425 2-in-1 User manual

Inspiron 14 7425 2-in-1
Service Manual
Regulatory Model: P161G
Regulatory Type: P161G003
January 2022
Rev. A00

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.
© 2022 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 inside your computer...................................................................................... 5
Before working inside your computer.............................................................................................................................5
Radiation Exposure Statement ................................................................................................................................. 5
Safety instructions.............................................................................................................................................................. 6
Electrostatic discharge—ESD protection..................................................................................................................... 6
ESD field service kit ........................................................................................................................................................... 7
Transporting sensitive components................................................................................................................................ 8
After working inside your computer................................................................................................................................8
Chapter 2: Removing and installing components........................................................................... 9
Recommended tools........................................................................................................................................................... 9
Screw list............................................................................................................................................................................... 9
Major components of Inspiron 7425 2-in-1..................................................................................................................10
Base cover........................................................................................................................................................................... 12
Removing the base cover...........................................................................................................................................12
Installing the base cover.............................................................................................................................................14
Battery..................................................................................................................................................................................16
Lithium-ion battery precautions............................................................................................................................... 16
Removing the battery..................................................................................................................................................17
Installing the battery....................................................................................................................................................18
Coin-cell battery.................................................................................................................................................................18
Removing the coin-cell battery.................................................................................................................................18
Installing the coin-cell battery...................................................................................................................................19
Memory................................................................................................................................................................................20
Removing the memory............................................................................................................................................... 20
Installing the memory.................................................................................................................................................. 21
Wireless card...................................................................................................................................................................... 23
Removing the wireless card...................................................................................................................................... 23
Installing the wireless card........................................................................................................................................ 23
Solid-state drive................................................................................................................................................................ 25
Removing the M.2 2230 solid-state drive............................................................................................................. 25
Installing the M.2 2230 solid-state drive............................................................................................................... 26
Removing the M.2 2280 solid-state drive............................................................................................................. 27
Installing the M.2 2280 solid-state drive............................................................................................................... 28
Speakers.............................................................................................................................................................................. 29
Removing the speakers..............................................................................................................................................29
Installing the speakers................................................................................................................................................30
Heat sink.............................................................................................................................................................................. 31
Removing the heat sink.............................................................................................................................................. 31
Installing the heat sink................................................................................................................................................32
Display assembly................................................................................................................................................................33
Removing the display assembly............................................................................................................................... 33
Installing the display assembly..................................................................................................................................35
Fan........................................................................................................................................................................................ 37
Contents
Contents 3

Removing the fan........................................................................................................................................................ 37
Installing the fan.......................................................................................................................................................... 38
I/O board.............................................................................................................................................................................38
Removing the I/O board............................................................................................................................................38
Installing the I/O board.............................................................................................................................................. 39
Power-button.....................................................................................................................................................................40
Removing the power-button.................................................................................................................................... 40
Installing the power-button ...................................................................................................................................... 41
Removing the power-button with fingerprint reader ........................................................................................ 42
Installing the power-button with fingerprint reader .......................................................................................... 43
System board..................................................................................................................................................................... 44
Removing the system board..................................................................................................................................... 44
Installing the system board....................................................................................................................................... 47
Palm-rest and keyboard assembly................................................................................................................................ 49
Removing the palm-rest and keyboard assembly................................................................................................ 49
Installing the palm-rest and keyboard assembly.................................................................................................. 50
Chapter 3: Drivers and downloads............................................................................................... 52
Chapter 4: System setup............................................................................................................. 53
Entering BIOS setup program........................................................................................................................................ 53
Navigation keys..................................................................................................................................................................53
One time boot menu.........................................................................................................................................................53
System setup options.......................................................................................................................................................54
System and setup password...........................................................................................................................................57
Assigning a system setup password....................................................................................................................... 57
Deleting or changing an existing system setup password.................................................................................58
Clearing BIOS (System Setup) and System passwords.................................................................................... 58
Clearing CMOS settings............................................................................................................................................ 58
Updating the BIOS............................................................................................................................................................ 59
Updating the BIOS in Windows................................................................................................................................59
Updating the BIOS using the USB drive in Windows......................................................................................... 59
Updating the BIOS from the F12 One-Time boot menu.................................................................................... 59
Chapter 5: Troubleshooting......................................................................................................... 61
Handling swollen Lithium-ion batteries.........................................................................................................................61
Locate the Service Tag or Express Service Code of your Dell computer .............................................. 61
System diagnostic lights..................................................................................................................................................62
SupportAssist diagnostics............................................................................................................................................... 63
Built-in self-test (BIST)................................................................................................................................................... 63
Recovering the operating system................................................................................................................................. 63
WiFi power cycle............................................................................................................................................................... 64
Backup media and recovery options.............................................................................................................................64
Drain residual flea power (perform hard reset)......................................................................................................... 64
Chapter 6: Getting help and contacting Dell................................................................................ 66
4Contents

Working inside your computer
Before working inside your computer
Steps
1. Save and close all open files and exit all open applications.
2. Shut down your computer. For Windows operating system, click Start > Power > Shut down.
NOTE: If you are using a different 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 disk from your computer, if applicable.
6. Enter the service mode, if you are able to power on your computer.
Service Mode
Service Mode is used to cut-off power, without disconnecting battery cable from system board prior conducting repairs in
the computer.
CAUTION: If you are unable to turn on the computer to put it into Service Mode or the computer does not
support Service Mode then proceed to disconnect the battery cable. To disconnect the battery cable, follow
the steps in Removing the battery.
NOTE: Ensure that your computer is shut down and the AC adapter is disconnected.
a. Hold <B> key on the keyboard and press the power button for 3 seconds or until the Dell logo appears on the screen.
b. Press any key to continue.
c. If the AC adapter is not disconnected, a message prompting you to remove the AC adapter appears on the screen.
Remove the AC adapter and then press any key to continue the Service Mode procedure. The Service Mode procedure
automatically skips the following step if the Owner Tag of the computer is not set up in advance by the user.
d. When the ready-to-proceed message appears on the screen, press any key to proceed. The computer emits three short
beeps and shuts down immediately.
e. Once the computer shuts down, it has successfully entered Service Mode.
NOTE: If you are unable to power on your computer or unable to enter service mode skip this process.
Radiation Exposure Statement
This device meets the government's requirements for exposure to radio waves.
This device is designed and manufactured not to exceed the emission limits for exposure to radio frequency (RF) energy set by
the Federal Communications Commission (FCC) of the U.S. Government.
The exposure standard for wireless device employs a unit of measurement known as the Specific Absorption Rate, or SAR. The
SAR limit set by the FCC is 1.6 W
NOTE: Tests for SAR are conducted using standard operating positions accepted by the FCC with the device transmitting
at its highest certified power level in all tested frequency bands.
1
Working inside your computer 5