Dell Inspiron 14 7425 2-in-1 Service Manual
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Dell Inspiron 14 7425 2-in-1 Service Manual

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

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Summary of Contents for Dell 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 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: Table Of Contents

    Contents 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................
  • Page 4 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..........................

  • Page 5: Chapter 1: Working Inside Your Computer

    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.

  • Page 6: Safety Instructions

    ESD protection is an increasing concern. Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.

  • Page 7: Esd Field Service Kit

    Always place parts in your hand, on the ESD mat, in the system, or inside an anti-static bag. ● Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport. Working inside your computer...

  • Page 8: Transporting Sensitive Components

    It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all insulator parts while performing service and that they use anti-static bags for transporting sensitive components.

  • Page 9: Chapter 2: Removing And Installing Components

    Removing and installing components NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Recommended tools The procedures in this document may require the following tools: ● Phillips screwdrivers #0 ● Plastic scribe Screw list NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and...

  • Page 10: Major Components Of Inspiron 7425 2-In-1

    Table 1. Screw list (continued) Component Screw type Quantity Screw image I/O board M2x3 Display hinges M2.5x4 Power-button/Power- M2x3 button with fingerprint reader USB Type-C bracket M2x4 System board M2x2 Major components of Inspiron 7425 2-in-1 The following image shows the major components of Inspiron 7425 2-in-1. Removing and installing components...
  • Page 11 1. Base 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...

  • Page 12: Base Cover

    18. I/O board NOTE: Dell provides a list of components and their part numbers for the original system configuration purchased. These parts are available according to warranty coverages purchased by the customer. Contact your Dell sales representative for purchase options.
  • Page 13 Removing and installing components...

  • Page 14: Installing The Base Cover

    Steps 1. Remove the four screws (M2x4) that secure the base cover to the palm-rest and keyboard assembly. 2. Loosen the three captive screws that secure the base cover to the palm-rest and keyboard assembly. NOTE: Upon loosening the captive screws, the base cover will open up creating a gap between the base cover and the palm-rest assembly at the hinges.
  • Page 15 Removing and installing components...

  • Page 16: Battery

    Steps 1. Connect the battery cable to the connector on the system board and adhere the tape that secures the battery cable to the battery. 2. Align the screw holes on the base cover with the screw holes on the palm-rest and keyboard assembly, and then snap the base cover into place.

  • Page 17: Removing The Battery

    ● If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing, bending, or crushing a lithium-ion battery can be dangerous. In such an instance, contact Dell technical support for assistance. See www.dell.com/contactdell.

  • Page 18: Installing The Battery

    Installing the battery Installing the 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 battery and provides a visual representation of the installation procedure. Steps 1.

  • Page 19: Installing The Coin-Cell Battery

    About this task NOTE: 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. The following image indicates the location of the coin-cell battery and provides a visual representation of the removal procedure. Steps 1.

  • Page 20: Memory

    Steps 1. Adhere the coin-cell battery to the slot on the palm-rest and keyboard assembly. 2. Connect the coin-cell battery cable to the I/O board. Next steps 1. Install the base cover. 2. Follow the procedure in After working inside your computer.

  • Page 21: Installing The Memory

    Steps 1. Lift the Mylar to access the memory. 2. Use your fingertips to carefully spread apart the securing-clips on each end of the memory slot until the memory pops up. 3. Slide and remove the memory from the memory slot. NOTE: Repeat step 1 to step 3 to remove any other memory installed in your computer.
  • Page 22 Steps 1. Lift the MyLar to access the memory slot. 2. Align the notch on the memory with the tab on the memory slot. 3. Slide the memory firmly at an angle, 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.

  • Page 23: Wireless Card

    Wireless card Removing the wireless card 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 wireless card and provides a visual representation of the removal procedure. Steps 1.
  • Page 24 About this task The following image indicates the location of the wireless card and provides a visual representation of the installation procedure. Steps 1. Connect the antenna cables to the wireless card. The following table provides the antenna-cable color scheme for the wireless card that is supported by your computer. Table 2.

  • Page 25: Solid-State Drive

    Solid-state drive Removing the M.2 2230 solid-state drive Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 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: ●...

  • Page 26: Installing The M.2 2230 Solid-State Drive

    Steps 1. Remove the screw (M2x3) that secures the M.2 2230 mounting bracket to the palmrest and keyboard assembly. 2. Slide and lift the M.2 2230 solid-state drive and its mounting bracket from the M.2 card slot on the system board. 3.

  • Page 27: Removing The M.2 2280 Solid-State Drive

    Steps 1. Align the notch on the M.2 2230 solid-state to the mounting bracket. 2. Replace the screw (M2x2) that secures the M.2 2230 solid-state drive to the mounting bracket. 3. Flip over the M.2 2230 solid-state drive and mounting bracket. 4.

  • Page 28: Installing The M.2 2280 Solid-State Drive

    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 bracket ● M.2 2280 solid-state drive The following image indicates the location of the M.2 2280 solid-state drive and provides a visual representation of the removal procedure.

  • Page 29: Speakers

    Steps 1. Align the notch on the solid-state drive with the tab on the solid-state drive slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x3) that secures the solid-state drive to the palm-rest and keyboard assembly. Next steps 1.

  • Page 30: Installing The Speakers

    Steps 1. Peel the tape securing the antenna cables to the palm-rest and keyboard assembly and move the antenna cables off the speaker cable. 2. Disconnect the speaker cable from the system board. 3. Peel the tapes that secure the speaker cable to the palm-rest and keyboard assembly. 4.

  • Page 31: Heat Sink

    Steps 1. Using the alignment posts and rubber grommets, place the speakers on the slots of the palm-rest and keyboard assembly. 2. Route the speaker cable through the routing guides on the palm-rest and keyboard assembly. 3. Adhere the tapes that secure the speaker cable to the palm-rest and keyboard assembly. 4.

  • Page 32: Installing The Heat Sink

    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.

  • Page 33: Display Assembly

    Steps 1. Align 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 four captive screws that secure the heat sink to the system board.
  • Page 34 Removing and installing components...

  • Page 35: Installing The Display Assembly

    Steps 1. Peel the tape that secures the display-cable connector latch to the system board. 2. Open the latch, and disconnect the display cable from the system board. 3. Remove the two screws (M2.5x4) that secure the left-display hinge to the palm-rest and keyboard assembly. 4.
  • Page 36 Removing and installing components...

  • Page 37: Fan

    Steps 1. Place the display assembly on a clean and flat surface with the display panel facing up. 2. Gently place the palm-rest and keyboard assembly under the display hinges. CAUTION: To avoid damaging the display, do not slide the palm-rest and keyboard assembly over the display assembly.

  • Page 38: Installing The Fan

    Steps 1. Disconnect the fan cable from the system board. 2. Remove the two screws (M2x3) that secure the fan to the palm-rest and keyboard assembly. 3. Lift the fan off the palm-rest and keyboard assembly. Installing the fan Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 39: Installing The I/O Board

    2. Remove the base cover. About this task The following image indicates the location of the I/O-board and provides a visual representation of the removal procedure. Steps 1. Remove the two screws (M2.5x4) that secure the left-display hinge to the I/O board. 2.

  • Page 40: Power-Button

    Steps 1. Align the ports on the I/O board to the slots on the palm-rest and keyboard assembly. 2. Place the I/O board on the palm-rest and keyboard assembly. 3. Align the screw hole on the I/O board to the screw hole on the palm-rest and keyboard assembly. 4.

  • Page 41: Installing The Power-Button

    About this task NOTE: This procedure is applicable only for computers that are shipped without the optional fingerprint reader. The following image indicates the location of the power-button and provides a visual representation of the removal procedure. Steps 1. Remove the two screws (M2x3) that secure the power-button to the palm-rest and keyboard assembly. 2.

  • Page 42: Removing The Power-Button With Fingerprint Reader

    Steps 1. Align the screw holes on the power-button with the screw holes on the palm-rest and keyboard assembly. 2. Replace the two screws (M2x3) that secure power-button to the palm-rest and keyboard assembly. Next steps 1. Install the board. 2.

  • Page 43: Installing The Power-Button With Fingerprint Reader

    Steps 1. Remove the two screws (M2x3) that secure the power-button with fingerprint reader to the palm-rest and keyboard assembly. 2. Lift the power-button with fingerprint reader, along with the fingerprint-reader cable, off the slot on the palm-rest and keyboard assembly. 3.

  • Page 44: System Board

    Steps 1. Align and place the power-button, along with the fingerprint-reader cable, on the slot of the palm-rest and keyboard assembly. 2. Align the screw holes on the power-button with the screw holes on the palm-rest and keyboard assembly. 3. Replace the two screws (M2x3) that secure power-button to the palm-rest and keyboard assembly. 4.
  • Page 45 About this task The following image indicates the connectors on your system board. Figure 1. System-board connectors 1. Display cable 2. Keyboard-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.
  • Page 46 Steps 1. Open the display-cable connector latch, and disconnect the display cable from the system board. 2. Remove the three screws (M2.5x4) that secure the right display hinge to the system board and palm-rest and keyboard assembly. 3. Open the hinge at an angle of 90 degrees. 4.

  • Page 47: Installing The System Board

    7. Open the latch, and disconnect the keyboard cable from the system board. 8. Open the latch, and disconnect the touchpad cable from the system board. 9. Peel the tape that secures the I/O-board cable to the system board. 10. Open the latch, and disconnect the I/O-board cable from the system board. 11.
  • Page 48 Steps 1. Align and place the system board on the palm-rest and keyboard assembly. 2. Replace the two screws (M2x2) that secure the system board to the palm-rest and keyboard assembly. 3. Connect the display cable to the connector on the system board and close the latch to secure the cable. 4.

  • Page 49: Palm-Rest And Keyboard Assembly

    8. Adhere the tape that secures the I/O-board cable to the system board. 9. Close the right display hinge. 10. Replace the three screws (M2.5x4) that secure the right display hinge to the system board and palm-rest and keyboard assembly. 11.

  • Page 50: Installing The Palm-Rest And Keyboard Assembly

    Steps After performing the steps in the pre-requisites, you are left with the palm-rest and keyboard assembly. Installing the palm-rest and keyboard 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.
  • Page 51 Steps Place the palm-rest and keyboard assembly on a clean and flat surface. Next steps 1. Install the system board. 2. Install the display assembly. 3. Install the power button power button with fingerprint reader. 4. Install the fan. 5. Install the heat sink.

  • Page 52: Chapter 3: Drivers And Downloads

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

  • Page 53: Chapter 4: System Setup

    System setup CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS Setup program. Certain changes can make your computer work incorrectly. NOTE: Depending on the computer and its installed devices, the items listed in this section may or may not be displayed. NOTE: Before you change BIOS Setup program, it is recommended that you write down the BIOS Setup program screen information for future reference.

  • Page 54: System Setup Options

    The one-time boot menu displays the devices that you can boot from including the diagnostic option. The boot menu options are: ● Removable Drive (if available) ● STXXXX Drive (if available) NOTE: XXX denotes the SATA drive number. ● Optical Drive (if available) ●...
  • Page 55 Table 5. System setup options—Advance menu (continued) Advanced NOTE: You cannot boot any type of USB device (floppy, hard drive, or memory key) when this option is off. Default: Enabled SATA Operation Allows you to configure the operating mode of the integrated SATA hard drive controller.
  • Page 56 Advanced SupportAssist System Resolution Auto OS Recovery Threshold Controls the automatic boot flow for SupportAssist System Resolution Console and for the Dell OS Recovery tool. Default: 2 SupportAssist OS Recovery Enables or disables the boot flow for the SupportAssist OS Recovery tool in the even of certain system errors.

  • Page 57: System And Setup Password

    Table 7. System setup options—Boot menu (continued) Boot Windows Boot Manager Display boot options in Windows UEFI Boot Enables or disables UEFI boot. Default: Disabled Table 8. System setup options—Exit menu Exit Exit Saving Changes Allows you to exit system setup and save your changes. Save Change Without Exit Allows you to save your changes without exiting the BIOS setup.

  • Page 58: Deleting Or Changing An Existing System Setup Password

    Clearing BIOS (System Setup) and System passwords About this task To clear the system or BIOS passwords, contact Dell technical support as described at www.dell.com/contactdell. NOTE: For information on how to reset Windows or application passwords, refer to the documentation accompanying Windows or your application.

  • Page 59: Updating The Bios

    One-Time boot menu on the computer. Most of the Dell computers built after 2012 have this capability, and you can confirm by booting your computer to the F12 One-Time Boot Menu to see if BIOS FLASH UPDATE is listed as a boot option for your computer. If the option is listed, then the BIOS supports this BIOS update option.
  • Page 60 ● USB drive formatted to the FAT32 file system (key does not have to be bootable) ● BIOS executable file that you downloaded from the Dell Support website and copied to the root of the USB drive ● AC power adapter that is connected to the computer ●...

  • Page 61: Chapter 5: Troubleshooting

    ● Using a non-Dell or incompatible battery may increase the risk of fire or explosion. Replace the battery only with a compatible battery purchased from Dell that is designed to work with your Dell computer. Do not use a battery from other computers with your computer.

  • Page 62: System Diagnostic Lights

    System diagnostic lights Battery-status light Indicates the power and battery-charge status. Solid white — Power adapter is connected and the battery has more than 5 percent charge. Amber — Computer is running on battery and the battery has less than 5 percent charge. ●...

  • Page 63: Supportassist Diagnostics

    Recovering the operating system When your computer is unable to boot to the operating system even after repeated attempts, it automatically starts Dell SupportAssist OS Recovery. Dell SupportAssist OS Recovery is a standalone tool that is preinstalled in all Dell computers installed with Windows operating system.

  • Page 64: Wifi Power Cycle

    You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their primary operating system due to software or hardware failures. For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide at www.dell.com/serviceabilitytools.
  • Page 65 NOTE: For more information about performing a hard reset, see the knowledge base article 000130881 www.dell.com/support. Troubleshooting...

  • Page 66: Chapter 6: Getting Help And Contacting Dell

    Getting help and contacting Dell Self-help resources You can get information and help on Dell products and services using these self-help resources: Table 12. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell app...

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