Dell Inspiron 14 7425 2-in-1 Service Manual Download Page 32

Page: 32 / 66

NOTE:

The number of captive screws and the appearance of the heat sink may vary depending on the configuration you

ordered.

The following image indicates the location of the heat sink and provides a visual representation of the removal procedure.

Steps

1. In reverse sequential order (as indicated on the heat sink), loosen the four captive screws that secure the heat sink to the

system board.

2. Lift the heat sink off the system board.

Installing the heat sink

Prerequisites

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

CAUTION:

Incorrect alignment of the heat sink can damage the system board and processor.

NOTE:

If either the system board or the heat sink is replaced, use the thermal pad/paste provided in the kit to ensure that

thermal conductivity is achieved.

NOTE:

The number of captive screws and the appearance of the heat sink may vary depending on the configuration you

ordered.

The following image indicates the location of the heat sink and provides a visual representation of the installation procedure.

Removing and installing components

Summary of Contents for Inspiron 14 7425 2-in-1

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

Page 2: ...ential 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 ...

Page 3: ...ving 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 ...

Page 4: ...e 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 Ch...

Page 5: ... 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 a...

Page 6: ... ensure that the ports and the connectors are correctly oriented and aligned CAUTION Press and eject any installed card from the media card reader 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 do...

Page 7: ...ecommended 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 st...

Page 8: ...tatic bags for safe transport After working inside your computer About this task NOTE Leaving stray or loose screws inside your computer may severely damage your computer Steps 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 ...

Page 9: ... This is to ensure that the correct number of screws and correct screw type is restored when the component is replaced NOTE Some computers have magnetic surfaces Ensure that the screws are not left attached to such surfaces when replacing a component NOTE Screw color may vary with the configuration ordered Table 1 Screw list Component Screw type Quantity Screw image Base cover M2x4 Captive screw 4...

Page 10: ...M2x3 2 Display hinges M2 5x4 5 Power button Power button with fingerprint reader M2x3 2 USB Type C bracket M2x4 2 System board M2x2 2 Major components of Inspiron 7425 2 in 1 The following image shows the major components of Inspiron 7425 2 in 1 10 Removing and installing components ...

Page 11: ...ase cover 2 USB Type C bracket 3 System board 4 I O board cable 5 Speakers 6 Battery 7 Touchpad bracket 8 Memory 9 Palm rest and keyboard assembly 10 Display assembly Removing and installing components 11 ...

Page 12: ...ing to warranty coverages purchased by the customer Contact your Dell sales representative for purchase options Base cover Removing the base cover Prerequisites 1 Follow the procedure in Before working inside your computer NOTE Ensure that your computer is in Service Mode For more information see step 6 in Before working inside your computer About this task The following images indicate the locati...

Page 13: ...Removing and installing components 13 ...

Page 14: ...ssembly 4 Peel the tape that secures the battery cable to the system board and disconnect the battery cable from the system board 5 Turn the computer over and open the display 6 Press and hold the power button for 15 seconds to ground the computer and drain the flea power After draining the flea power close the display and turn the computer over Installing the base cover Prerequisites If you are r...

Page 15: ...Removing and installing components 15 ...

Page 16: ...crews that secure the base cover to the palm rest and keyboard assembly Next steps 1 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 completely before removing it Disconnect the AC power adapter from the system and operate the computer solely on battery power the ba...

Page 17: ...ries from www dell com or authorized Dell partners and resellers Swollen batteries should not be used and should be replaced and disposed properly For guidelines on how to handle and replace swollen Lithium ion batteries see Handling swollen Lithium ion batteries Removing the battery Removing the battery Prerequisites 1 Follow the procedure in Before working inside your computer 2 Remove the base ...

Page 18: ...ce the battery on the palm rest and keyboard assembly 2 Replace the five screws M2x3 that secure the battery to the palm rest and keyboard assembly 3 Connect the battery cable to the system board 4 Adhere the tape that secures the battery cable to the system board Next steps 1 Install the base cover 2 Follow the procedure in After working inside your computer Coin cell battery Removing the coin ce...

Page 19: ...the removal procedure Steps 1 Disconnect the coin cell battery from the I O board 2 Peel the coin cell battery and lift it off the slot on the palm rest and keyboard assembly Installing the coin cell battery Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following image indicates the location of the coin...

Page 20: ...ase cover 2 Follow the procedure in After working inside your computer Memory Removing the memory Prerequisites 1 Follow the procedure in Before working inside your computer 2 Remove the base cover About this task The following image indicates the location of the memory and provides a visual representation of the removal procedure 20 Removing and installing components ...

Page 21: ...ry slot NOTE Repeat step 1 to step 3 to remove any other memory installed in your computer Installing the memory Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following image indicates the location of the memory and provides a visual representation of the installation procedure Removing and installing c...

Page 22: ...e into the memory slot 4 Press the memory down until it clicks into place NOTE If you do not hear the click remove the memory and reinstall it NOTE Repeat step 1 to step 4 to install any other memory in your computer Next steps 1 Install the base cover 2 Follow the procedure in After working inside your computer 22 Removing and installing components ...

Page 23: ...cedure Steps 1 Remove the screw M2x3 that secures the wireless card bracket to the wireless card and system board 2 Lift the wireless card bracket off the wireless card 3 Disconnect the antenna cables from the wireless card 4 Slide and remove the wireless card from the wireless card slot Installing the wireless card Prerequisites If you are replacing a component remove the existing component befor...

Page 24: ...color Silkscreen marking Main White MAIN white triangle Auxiliary Black AUX black triangle 2 Align the notch on the wireless card with the tab on the wireless card slot and insert the wireless card at an angle into the wireless card slot 3 Align the screw hole on the wireless card bracket with the screw hole on the wireless card and palm rest and keyboard assembly 4 Replace the screw M2x3 that sec...

Page 25: ...e M 2 card installed on your computer will depend on the configuration ordered Supported card configurations on the M 2 card slot M 2 2230 solid state drive 2230 mounting bracket M 2 2280 solid state drive The following image indicates the location of the M 2 2230 solid state drive and provides a visual representation of the removal procedure Removing and installing components 25 ...

Page 26: ...state drive off the mounting bracket Installing the M 2 2230 solid state drive Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task NOTE The M 2 card installed on your computer will depend on the configuration ordered Supported card configurations on the M 2 card slot M 2 2230 solid state drive 2230 mounting brack...

Page 27: ...e the M 2 2230 solid state drive and its mounting bracket on the system board 5 Replace the screw M2x3 that secures the M 2 thermal plate to the palm rest and keyboard assembly Next steps 1 Install the base cover 2 Follow the procedure in After working inside your computer Removing the M 2 2280 solid state drive Prerequisites 1 Follow the procedure in Before working inside your computer 2 Remove t...

Page 28: ...ard assembly 2 Slide and remove the solid state drive from the solid state drive slot Installing the M 2 2280 solid state drive Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task NOTE The M 2 card installed on your computer will depend on the configuration ordered Supported card configurations on the M 2 card sl...

Page 29: ...ssembly Next steps 1 Install the base cover 2 Follow the procedure in After working inside your computer Speakers Removing the speakers Prerequisites 1 Follow the procedure in Before working inside your computer 2 Remove the base cover 3 Remove the battery 4 Remove the wireless card About this task The following image indicates the location of the speakers and provides a visual representation of t...

Page 30: ...the speaker cable from the routing guides on the palm rest and keyboard assembly 5 Lift the speakers along with the cables off the palm rest and keyboard assembly Installing the speakers Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following image indicates the location of the speakers and provides a v...

Page 31: ...st and keyboard assembly Next steps 1 Install the battery 2 Install the wireless card 3 Install the base cover 4 Follow the procedure in After working inside your computer Heat sink Removing the heat sink Prerequisites 1 Follow the procedure in Before working inside your computer 2 Remove the base cover About this task CAUTION For maximum cooling of the processor do not touch the heat transfer are...

Page 32: ...quisites If you are replacing a component remove the existing component before performing the installation procedure About this task CAUTION Incorrect alignment of the heat sink can damage the system board and processor NOTE If either the system board or the heat sink is replaced use the thermal pad paste provided in the kit to ensure that thermal conductivity is achieved NOTE The number of captiv...

Page 33: ...t steps 1 Install the base cover 2 Follow the procedure in After working inside your computer Display assembly Removing the display assembly Prerequisites 1 Follow the procedure in Before working inside your computer 2 Remove the base cover About this task The following image indicates the location of the display assembly and provides a visual representation of the removal procedure Removing and i...

Page 34: ...34 Removing and installing components ...

Page 35: ... and keyboard assembly 6 Pry open the right display hinge at an angle of 90 degrees 7 Gently lift the palm rest and keyboard assembly off the display assembly CAUTION To avoid damaging the display do not slide the palm rest and keyboard assembly over the display assembly Installing the display assembly Prerequisites If you are replacing a component remove the existing component before performing t...

Page 36: ...36 Removing and installing components ...

Page 37: ...nge and align the screw holes on the right display hinge with the screw holes on the system board 6 Replace the three screws M2 5x4 that secure the right display hinge to the palm rest and keyboard assembly 7 Connect the display cable to the connector on the system board and close the latch 8 Adhere the tape that secures the display cable connector latch to the system board Next steps 1 Install th...

Page 38: ... image indicates the location of the fan and provides a visual representation of the installation procedure Steps 1 Using the alignment posts place the fan on the palm rest and keyboard assembly 2 Remove the two screws M2x3 that secure the fan to the palm rest and keyboard assembly 3 Connect the fan cable to the system board Next steps 1 Install the base cover 2 Follow the procedure in After worki...

Page 39: ...ft the power button with fingerprint reader cable connector latch and disconnect the power button with fingerprint reader cable from the I O board 6 Disconnect the coin cell battery cable from the I O board 7 Remove the two screws M2x3 that secure the I O board to the palm rest and keyboard assembly 8 Lift the I O board off the palm rest and keyboard assembly Installing the I O board Prerequisites...

Page 40: ...nt reader cable to the connector on the I O board and close the latch 7 Connect the coin cell battery cable to the I O board 8 Close the left display hinge and align the screw holes on the left display hinge with the screw holes on the I O board 9 Replace the two screws M2 5x4 that secure the left display hinge to the I O board Next steps 1 Install the base cover 2 Follow the procedure in After wo...

Page 41: ...oard assembly 2 Lift the power button off the slot on the palm rest and keyboard assembly Installing the power button Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task NOTE This procedure is applicable only when you are installing a power button without the optional fingerprint reader The following image indica...

Page 42: ...mputer Removing the power button with fingerprint reader Prerequisites 1 Follow the procedure in Before working inside your computer 2 Remove the base cover 3 Remove the heat sink 4 Remove the fan 5 Remove the display assembly 6 Remove the I O board About this task NOTE This procedure is applicable only for computers that are shipped with a fingerprint reader on the power button The following imag...

Page 43: ...st and keyboard assembly Installing the power button with fingerprint reader Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task NOTE This procedure is applicable only when you are installing a power button with fingerprint reader into your computer The following image indicates the location of the power button w...

Page 44: ...d keyboard assembly Next steps 1 Install the I O board 2 Install the display assembly 3 Install the fan 4 Install the heat sink 5 Install the base cover 6 Follow the procedure in After working inside your computer System board Removing the system board Prerequisites 1 Follow the procedure in Before working inside your computer 2 Remove the base cover 3 Remove the battery 4 Remove the memory 5 Remo...

Page 45: ...yboard backlight cable 3 Keyboard cable 4 Touchpad cable 5 Speaker cable 6 M 2 card slot for solid state drive 7 M 2 card slot for wireless card 8 I O board cable 9 Fan cable The following image indicates the location of the system board and provides a visual representation of the removal procedure Removing and installing components 45 ...

Page 46: ...rest and keyboard assembly 3 Open the hinge at an angle of 90 degrees 4 Remove the two screws M2x4 that secure the USB Type C bracket to the system board and palm rest and keyboard assembly 5 Lift the USB Type C port bracket off the system board and palm rest and keyboard assembly 6 Open the latch and disconnect the keyboard backlight cable from the system board 46 Removing and installing componen...

Page 47: ...board assembly Installing the system board Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following image indicates the connectors on your system board Figure 2 System board connectors 1 Display cable 2 Keyboard backlight cable 3 Keyboard cable 4 Touchpad cable 5 Speaker cable 6 Solid state drive connect...

Page 48: ...able 4 Connect the keyboard backlight cable into the connector on the system board and close the latch to secure the cable 5 Connect the keyboard cable to the connector on the system board and close the latch to secure the cable 6 Connect the touchpad cable to the connector on the system board and close the latch to secure the cable 7 Connect the I O board cable to the connector on the system boar...

Page 49: ...ure in After working inside your computer Palm rest and keyboard assembly Removing the palm rest and keyboard assembly Prerequisites 1 Follow the procedure in Before working inside your computer 2 Remove the base cover 3 Remove the battery 4 Remove the coin cell battery 5 Remove the memory 6 Remove the wireless card 7 Remove the M 2 2230 solid state drive or M 2 2280 solid state drive whichever ap...

Page 50: ...eyboard assembly Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following image indicates the location of the palm rest and keyboard assembly and provides a visual representation of the installation procedure 50 Removing and installing components ...

Page 51: ... 4 Install the fan 5 Install the heat sink 6 Install the speakers 7 Install the I O board 8 Install the M 2 2230 solid state drive or M 2 2280 solid state drive whichever applicable 9 Install the wireless card 10 Install the memory 11 Install the coin cell battery 12 Install the battery 13 Install the base cover 14 Follow the procedure in After working inside your computer Removing and installing ...

Page 52: ...rivers and downloads When troubleshooting downloading or installing drivers it is recommended that you read the Dell Knowledge Based article Drivers and Downloads FAQ 000123347 3 52 Drivers and downloads ...

Page 53: ...ling base devices Entering BIOS setup program About this task Turn on or restart your computer and press F2 immediately Navigation keys NOTE For most of the System Setup options changes that you make are recorded but do not take effect until you restart the system Table 3 Navigation keys Keys Navigation Up arrow Moves to the previous field Down arrow Moves to the next field Enter Selects a value i...

Page 54: ... Asset Tag Displays the asset tag of your computer CPU Type Displays the processor type CPU Speed Displays the processor speed CPU ID Displays the processor identification code CPU Cache L1 Cache Displays the processor L1 cache size L2 Cache Displays the processor L2 cache size L3 Cache Displays the processor L3 cache size First HDD Displays the type of hard drive installed M 2 PCIe SSD Display th...

Page 55: ...r Default 1 minute Keyboard Backlight with Battery Selects the timeout value for the keyboard backlight when the computer is running on battery power Default 1 minute Battery Health Displays the battery health Camera Enables or disables the camera Default Disabled Battery Charge Configuration Set the battery charge settings with a preselected custom charge start and stop Default Adaptive Advance B...

Page 56: ...ols access to the computer at boot Password Change Allows you to permit or deny system password or HDD password changes Default Permitted Absolute Enables or disables the BIOS module interface of the optional Computrace Service from Absolute Software Default Deactivate Absolute Status Enables or disables SED Block SID Authentication Default Disabled Firmware TPM Enable or disable the firmware TPM ...

Page 57: ...Password that you must enter to access and make changes to the BIOS settings of your computer You can create a system password and a setup password to secure your computer CAUTION The password features provide a basic level of security for the data on your computer CAUTION Anyone can access the data that is stored on your computer if it is not locked and left unattended NOTE System and setup passw...

Page 58: ... and press Enter or Tab 4 Select Setup Password update or delete the existing setup password and press Enter or Tab NOTE If you change the System and or Setup password reenter the new password when prompted If you delete the System and or Setup password confirm the deletion when prompted 5 Press Esc and a message prompts you to save the changes 6 Press Y to save the changes and exit from System Se...

Page 59: ...ion see the knowledge base article 000145519 at www dell com support 3 Copy the BIOS setup program file to the bootable USB drive 4 Connect the bootable USB drive to the computer that needs the BIOS update 5 Restart the computer and press F12 6 Select the USB drive from the One Time Boot Menu 7 Type the BIOS setup program filename and press Enter The BIOS Update Utility appears 8 Follow the on scr...

Page 60: ...IOS update process The computer may not boot if you turn off your computer Steps 1 From a turn off state insert the USB drive where you copied the flash into a USB port of the computer 2 Turn on the computer and press F12 to access the One Time Boot Menu select BIOS Update using the mouse or arrow keys then press Enter The flash BIOS menu is displayed 3 Click Flash from file 4 Select external USB ...

Page 61: ...cks and cells Do not apply pressure to the surface of the battery Do not bend the battery Do not use tools of any type to pry on or against the battery 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 battery can be dangerous Do not attempt to reassemble a damaged or swollen battery into a laptop Swollen batteries that are covere...

Page 62: ...battery status light patterns and associated problems Table 10 LED codes Diagnostic light codes Amber white Problem description 1 1 TPM detection failure 1 2 Unrecoverable SPI flash failure 2 1 Processor failure 2 2 System board BIOS or Read Only Memory ROM failure 2 3 No memory or Random Access Memory RAM detected 2 4 Memory or Random Access Memory RAM failure 2 5 Invalid memory installed 2 6 Sys...

Page 63: ... board embedded controller EC failures M BIST must be manually initiated before POST and can also run on a dead system 2 L BIST L BIST is an enhancement to the single LED error code diagnostics and is automatically initiated during POST 3 LCD BIST LCD BIST is an enhanced diagnostic test that is introduced through Preboot System Assessment PSA on legacy systems Table 11 Functions M BIST L BIST Purp...

Page 64: ...drive to troubleshoot and fix problems that may occur with Windows Dell proposes multiple options for recovering Windows operating system on your Dell PC For more information see Dell Windows Backup Media and Recovery Options Drain residual flea power perform hard reset About this task Flea power is the residual static electricity that remains in the computer even after it has been powered off and...

Page 65: ...NOTE For more information about performing a hard reset see the knowledge base article 000130881 at www dell com support Troubleshooting 65 ...

Page 66: ...r Express Service Code at www dell com support For more information on how to find the Service Tag for your computer see Locate the Service Tag on your computer Dell knowledge base articles for a variety of computer concerns 1 Go to www dell com support 2 On the menu bar at the top of the Support page select Support Knowledge Base 3 In the Search field on the Knowledge Base page type the keyword t...

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