Dell P135G Service Manual
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Dell P135G Service Manual

Dell P135G Service Manual

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Latitude 7430
Service Manual
Regulatory Model: P135G/P136G
Regulatory Type: P135G002/P136G002
April 2022
Rev. A00

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Summary of Contents for Dell P135G

  • Page 1 Latitude 7430 Service Manual Regulatory Model: P135G/P136G Regulatory Type: P135G002/P136G002 April 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 Technologies, Dell, 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..................6 Safety instructions................................6 Before working inside your computer........................6 Safety precautions.................................7 Electrostatic discharge—ESD protection........................7 ESD field service kit ..............................8 Transporting sensitive components.......................... 9 After working inside your computer..........................9 BitLocker..................................9 Chapter 2: Removing and installing components................10 Recommended tools................................10 Screw list.....................................
  • Page 4 Removing the thermal module ..........................45 Installing the thermal module ..........................46 WLAN-antenna module..............................48 Removing the WLAN-antenna module ........................48 Installing the WLAN-antenna module ........................49 Coin-cell battery.................................51 Removing the coin-cell battery ..........................51 Installing the coin-cell battery ..........................51 Display assembly................................52 Removing the display assembly ..........................
  • Page 5 Clearing BIOS (System Setup) and System passwords..................114 Clearing chassis intrusion alert ............................ 114 Chapter 5: Troubleshooting......................116 Handling swollen Lithium-ion batteries........................116 Dell SupportAssist Pre-boot System Performance Check diagnostics...............116 Running the SupportAssist Pre-Boot System Performance Check............... 117 Built-in self-test (BIST)..............................117 M-BIST..................................117 LCD Power rail test (L-BIST)..........................

  • Page 6: Chapter 1: Working Inside Your Computer

    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 is shipped with the product or at www.dell.com/regulatory_compliance.

  • Page 7: Safety Precautions

    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 8: Esd Field Service Kit

    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. Two recognized types of ESD damage are catastrophic and intermittent failures.

  • Page 9: 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 10: 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 screwdriver #0 ● Phillips screwdriver #1 ●...

  • Page 11: Major Components Of Latitude 7430

    Table 1. Screw list (continued) Component Screw type Quantity Screw image WWAN shielding cover (for 5G ● M2x2.5 ● 3 ● antennas) ● M2x2.5 ● 2 WLAN-antenna module ● Darwin bracket ● M2x2.5 ● 1 ● ● M2x2 ● 2 Display-cable bracket ●...
  • Page 12 1. Base cover 2. Battery 3. I/O daughter-board 4. Thermal Module 5. System board 6. Speakers 7. Audio daughter-board 8. Palm-rest assembly Removing and installing components...

  • Page 13: Microsim-Card Tray

    17. WWAN card 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 14: Installing The Microsim-Card Tray

    5. Slide the microSIM-card tray into the microSIM-card tray slot on the computer, and push it to lock in place. Installing the microSIM-card tray Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the microSIM-card tray and provide a visual representation of the installation procedure.
  • Page 15 About this task The following images indicate the location of the base cover and provide a visual representation of the removal procedure. Removing and installing components...
  • Page 16 Steps 1. Loosen the eight captive screws that secure the base cover to the palm-rest and keyboard assembly. 2. Using a plastic scribe, pry open the base cover starting from the recesses, which are located in the U-shaped indents at the top edge of the base cover, near the hinges.

  • Page 17: Installing The Base Cover

    3. Pry open the top side of the base cover and continue working on the left, right and, bottom sides to open the base cover. 4. Lift the base cover from the left and right sides and remove the base cover off the palm-rest and keyboard assembly. Installing the base cover Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 18 Removing and installing components...

  • Page 19: Solid-State Drive (For Clamshell Computers)

    Steps 1. Place the base cover on top of the palm-rest and keyboard assembly. 2. Align the screw holes on the base cover with the screw holes on the palm-rest and keyboard assembly, and snap the base cover latches into place. 3.

  • Page 20: Installing The M.2 2230 Solid-State Drive (For Computers Shipped Without A Thermal Plate)

    Steps 1. Remove the two screws (M2x2) that secure the M.2 2230 solid-state drive extension bracket to the palm-rest and keyboard assembly. 2. Slide and remove the M.2 2230 solid-state drive extension bracket from the M.2 card slot on the system board. 3.
  • Page 21 3. Verify if the storage device is installed correctly: a. Turn on or restart your system. b. Press F2 when the Dell logo is displayed on the screen to enter the system setup (BIOS) program. NOTE: A list of storage devices are displayed under the System Information in the General group.

  • Page 22: Removing The M.2 2230 Solid-State Drive (For Computers Shipped With A Thermal Plate)

    If you have replaced the primary storage device that had the operating system installed, search in the Knowledge Base Resource at www.dell.com/support. Removing the M.2 2230 solid-state drive (for computers shipped with a thermal plate) Prerequisites 1. Follow the procedure in Before working inside your computer.

  • Page 23: Installing The M.2 2230 Solid-State Drive (For Computers Shipped With A Thermal Plate)

    NOTE: A thermal pad is included with the solid-state drive thermal plate and must always be adhered to the plate. If in the process of replacing the solid-state drive, the thermal pad is separated from the thermal plate or gets adhered to the solid-state drive, readhere the thermal pad to the solid-state drive thermal plate before reinstalling the thermal plate to the system.

  • Page 24: Removing The M.2 2280 Solid-State Drive

    3. Verify if the storage device is installed correctly: a. Turn on or restart your system. b. Press F2 when the Dell logo is displayed on the screen to enter the system setup (BIOS) program. NOTE: A list of storage devices are displayed under the System Information in the General group.

  • Page 25: Installing The M.2 2280 Solid-State Drive

    Steps 1. Remove the two screws (M2x2) that secure the M.2 2280 solid-state drive thermal plate to the palm-rest and keyboard assembly. 2. Slide and remove the M.2 2280 solid-state drive thermal plate off the palm-rest and keyboard assembly. NOTE: A thermal pad is included with the solid-state drive thermal plate and must always be adhered to the plate.

  • Page 26: Solid-State Drive (For 2-In-1 Computers)

    3. Verify if the storage device is installed correctly: a. Turn on or restart your system. b. Press F2 when the Dell logo is displayed on the screen to enter the system setup (BIOS) program. NOTE: A list of storage devices are displayed under the System Information in the General group.

  • Page 27: Installing The M.2 2230 Solid-State Drive (For Computers Shipped With A Thermal Plate)

    Steps 1. Remove the screw (M2x2) that secures the M.2 2230 solid-state drive thermal plate to the palm-rest and keyboard assembly. 2. Slide and lift the M.2 2230 solid-state drive thermal pate off the M.2 2230 solid-state drive. NOTE: A thermal pad is included with the solid-state drive thermal plate and must always be adhered to the plate. If in the process of replacing the solid-state drive, the thermal pad is separated from the thermal plate or gets adhered to the solid-state drive, readhere the thermal pad to the solid-state drive thermal plate before reinstalling the thermal plate to the system.
  • Page 28 3. Verify if the storage device is installed correctly: a. Turn on or restart your system. b. Press F2 when the Dell logo is displayed on the screen to enter the system setup (BIOS) program. NOTE: A list of storage devices are displayed under the System Information in the General group.

  • Page 29: Removing The M.2 2280 Solid-State Drive

    Removing the M.2 2280 solid-state drive Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task NOTE: This procedure applies only to computers shipped with a M.2 2280 solid-state drive installed. NOTE: The M.2 card that is installed on your computer depends on the configuration ordered.

  • Page 30: Installing The M.2 2280 Solid-State Drive

    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 The following images indicate the location of the M.2 2280 solid-state drive and provide a visual representation of the installation procedure.

  • Page 31: Wwan Card

    Press F2 when the Dell logo is displayed on the screen to enter the system setup (BIOS) program. NOTE: A list of storage devices are displayed under the System Information in the General group. c. If you have replaced the primary storage device that had the operating system installed, search in the Knowledge Base Resource at www.dell.com/support.

  • Page 32: Installing The 4G Wwan Card

    Steps 1. Using a plastic scribe, pry and remove the 4G WWAN-card shield covering the WWAN card. NOTE: Pry open the 4G WWAN-card shield from the recess on the upper left corner. 2. Remove the screw (M2x2.5) that secures the 4G WWAN-card bracket to the system board. 3.
  • Page 33 Steps 1. Align the notch on the 4G WWAN card with the tab on the M.2-card slot on the system board. 2. Slide the 4G WWAN card firmly into the M.2-card slot on the system board. 3. Connect the antenna cables to the connectors on the 4G WWAN card. NOTE: For computers shipped with a Cat 16 WWAN card that has four connectors, connect the #5 white/gray antenna cable to the main connector at the very right of the WWAN card and the #6 black/gray antenna cable to the Aux 1...
  • Page 34 The following table provides the antenna-cable color scheme for the wireless card supported by your system. Table 2. 4G WWAN-antenna cable color scheme Connectors on the wireless card Antenna cable color Main (white triangle) White Auxiliary (black triangle) Black Figure 1. 4G WWAN configuration 4.

  • Page 35: Removing The 5G Wwan Card

    NOTE: For instructions on how to find your computer's International Mobile Station Equipment Identity (IMEI) number, search in the Knowledge Base Resource at www.dell.com/support. Next steps 1. Install the base cover. 2. Follow the procedure in After working inside your computer.

  • Page 36: Installing The 5G Wwan Card

    Steps 1. Remove the three screws (M2x2.5) that secure the 5G WWAN shielding cover to the system board. 2. Remove the 5G WWAN shielding cover from the system board. 3. Disconnect the antenna cables from the connectors on the 5G WWAN card. 4.
  • Page 37 About this task The following images indicate the location of the 5G WWAN card and provide a visual representation of the installation procedure. Steps 1. Align the notch on the 5G WWAN card with the tab on the M.2-card slot on the system board. 2.

  • Page 38: Battery

    6. Replace the three screws (M2x2.5) to secure the 5G WWAN shielding cover and the 5G WWAN card to the system board. NOTE: For instructions on how to find your computer's International Mobile Station Equipment Identity (IMEI) number, search in the Knowledge Base Resource at www.dell.com/support. Next steps 1. Install the base cover.

  • Page 39: Removing The 3-Cell 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 40: Installing The 3-Cell Battery

    Steps 1. Use the pull tab to disconnect the battery cable from the connector on the system board. 2. Loosen the three captive screws that secure the 3-cell battery to the palm-rest and keyboard assembly. 3. Lift the 3-cell battery along with the battery cable off the palm-rest and keyboard assembly. 4.
  • Page 41 Steps 1. Carefully push the battery filler upwards to attach it to the 3-cell battery. Removing and installing components...

  • Page 42: Removing The 4-Cell Battery

    2. Place the 3-cell battery along with the battery cable on the palm-rest and keyboard assembly. 3. Align the screw holes on the 3-cell battery to the screw holes on the palm-rest and keyboard assembly. 4. Tighten the three captive screws to secure the 3-cell battery to the palm-rest and keyboard assembly. 5.

  • Page 43: Installing The 4-Cell Battery

    Steps 1. Use the pull tab to disconnect the battery cable from the connector on the system board. 2. Loosen the three captive screws that secure the 4-cell battery to the palm-rest and keyboard assembly. 3. Lift the 4-cell battery along with the battery cable off the palm-rest and keyboard assembly. Installing the 4-cell battery Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 44 Steps 1. Place the 4-cell battery along with the battery cable on the palm-rest and keyboard assembly. 2. Align the screw holes on the 4-cell battery to the screw holes on the palm-rest and keyboard assembly. 3. Tighten the three captive screws to secure the 4-cell battery to the palm-rest and keyboard assembly. 4.

  • Page 45: Thermal Module

    Thermal module Removing the thermal module Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task NOTE: The thermal module may become hot during normal operation. Allow sufficient time for the thermal module to cool before you touch it.

  • Page 46: Installing The Thermal Module

    2. Disconnect the thermal-fan cable from the connector on the system board. 3. Disconnect the speaker cable from the connector on the system board. 4. Unroute the speaker cable from its routing guides, along the bottom side of the thermal fan. 5.
  • Page 47 About this task NOTE: If either the system board or the thermal module is replaced, use the thermal grease provided in the kit to ensure that thermal conductivity is achieved. The following image indicates the location of the thermal module and provides a visual representation of the installation procedure.

  • Page 48: Wlan-Antenna Module

    5. Connect the speaker cable to the connector on the system board. 6. Connect the thermal-fan cable to the connector on the system board. 7. Align and place the system-board shield and solid-state drive thermal plate over their slots on the system board. 8.

  • Page 49: Installing The Wlan-Antenna Module

    Steps 1. For computers shipped with 4G antennas, remove the screw (M2x2) that secures the WLAN-antenna module bracket to the system board. 2. For computers shipped with 5G antennas, remove the three screws (M2x2.5) that secure the WWAN shielding cover to the system board.
  • Page 50 Steps 1. Slide and place the WLAN-antenna module into the WLAN-antenna module slot on the system board. 2. Replace the two screws (M2x2.5) to secure the WLAN-antenna module to the system board. 3. Route the WLAN-antenna cables into the routing guides on the system board. 4.

  • Page 51: Coin-Cell Battery

    Coin-cell battery Removing the coin-cell battery Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the 3-cell battery or the 4-cell battery, whichever applicable. About this task The following image indicates the location of the coin-cell battery and provides a visual representation of the removal procedure. Steps 1.

  • Page 52: Display Assembly

    Steps 1. Place the coin-cell battery into its slot on the palm-rest and keyboard assembly. 2. Connect the coin-cell battery cable and LED daughter-board flexible flat cable to the respective connectors on the system board. Next steps 1. Install the 3-cell battery or the 4-cell...
  • Page 53 Removing and installing components...
  • Page 54 Steps 1. Remove the screw (M2x2) that secures the WLAN bracket to the system board. 2. Slide and remove the WLAN bracket from the system board. 3. Disconnect the WLAN-antenna cables from the connectors on the system board. 4. Unroute the WLAN-antenna cables from the routing guides on the system board. NOTE: The steps from 1 to 4 apply only to computers shipped with a WLAN antenna installed in the display assembly.
  • Page 55 8. For systems shipped with 4G antennas, unroute the #1 Darwin antenna cable, #2 Darwin antenna cable, #6 black/gray WWAN Aux1 antenna cable and #5 white/gray WWAN Main antenna cable from the respective routing guides on the palm-rest and keyboard assembly. NOTE: The steps from 5 to 8 apply only to computers shipped with a WWAN card installed.

  • Page 56: Installing The Display Assembly

    Figure 3. Display assembly with WWAN-antenna cables Installing the display assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task NOTE: Ensure that the hinges are opened to the maximum before replacing the display assembly on the palm-rest and keyboard assembly.
  • Page 57 Removing and installing components...
  • Page 58 Steps 1. Place the palm-rest and keyboard assembly on a flat surface. 2. Slide the display assembly at an angle and place the display assembly on the palm-rest and keyboard assembly. 3. Gently press down on the display hinges to align the screw holes on the display hinges with the screw holes on the palm-rest and keyboard assembly.
  • Page 59 7. Align and place the display-cable bracket into its slot on the system board. 8. Replace the two screws (M2x2) to secure the display-cable bracket to the system board. 9. For computers shipped with 5G antennas, route the #1 Darwin antenna cable, #2 Darwin antenna cable, #3 black/gray WWAN antenna cable, #2 blue WWAN antenna cable, #1 orange WWAN antenna cable and #0 white/gray WWAN antenna cable through the respective routing guides on the palm-rest and keyboard assembly.
  • Page 60 Figure 4. 4G WWAN configuration Figure 5. 5G WWAN configuration 12. For computers shipped with 4G antennas, align and place the Darwin bracket into its slot on the system board. 13. For computers shipped with 4G antennas, replace the screw (M2x2.5) to secure the Darwin bracket to the system board. NOTE: The steps from 11 to 14 apply only to computers shipped with a WWAN card installed.

  • Page 61: Audio Daughter-Board

    Next steps 1. Install the 4G WWAN card or the 5G WWAN card, whichever applicable. NOTE: This procedure applies only to computers shipped with a WWAN card installed. 2. Install the base cover. 3. Follow the procedure in After working inside your computer.

  • Page 62: Installing The Audio Daughter-Board

    Steps 1. Disconnect the speaker cable and the audio daughter-board flexible flat cable from the respective connectors on the system board. 2. Peel back the audio daughter-board flexible flat cable from the palm-rest and keyboard assembly. 3. Remove the screw (M2x2.5) that secures the audio daughter-board to the system board. 4.

  • Page 63: Speakers

    5. Connect the audio daughter-board flexible flat cable and the speaker cable to the respective connectors on the system board. Next steps 1. Install the 3-cell battery or the 4-cell battery, whichever applicable. 2. Install the base cover. 3. Follow the procedure in After working inside your computer.

  • Page 64: Installing The Speakers

    5. Peel back the tape that secures the speaker cable to the palm-rest and touchpad. 6. Unroute and remove the speaker cable from the routing guides along the bottom side of the thermal fan and on the palm-rest and keyboard assembly. 7.
  • Page 65 Steps 1. Using the alignment posts and rubber grommets, place the speakers into the slots on the palm-rest and keyboard assembly. NOTE: Ensure that the alignment posts are threaded through the rubber grommets on the speakers. 2. Route the speaker cable along the bottom side of the palm-rest and keyboard assembly and the thermal fan. Then secure the speaker cable into the routing guides on the palm-rest and keyboard assembly.

  • Page 66: Smart Card Reader

    5. For systems shipped with 4G antennas, connect the speaker cable to the connector on the system board. 6. For systems shipped with 5G antennas, place the WWAN shielding cover in its slot on the system board. 7. For systems shipped with 5G antennas, align the screw holes on the WWAN shielding cover with the screw holes on the system board.
  • Page 67 Removing and installing components...

  • Page 68: Installing The Smart Card Reader

    Steps 1. Disconnect the speaker cable from the connector on the system board. 2. Unroute and remove the speaker cable from the routing guides along the bottom side of the thermal fan. 3. Using a plastic scribe, pry the left speaker along with the cable off the palm-rest and keyboard assembly. 4.
  • Page 69 Removing and installing components...
  • Page 70 Steps 1. Place the smart card reader along with the smart card reader flexible flat cable into its slot on the computer. 2. Replace the four screws (M2x2.5) to secure the smart card reader to the plam-rest and keyboard assembly. 3.

  • Page 71: System Board

    3. 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 microSIM-card tray. 3. Remove the base cover. 4. Remove the M.2 2230 solid-state drive or the M.2 2280 solid-state...
  • Page 72 14. Touchpad FFC connector 15. USH daughter-board FFC connector 16. LED daughter-board FFC connector 17. Coin-cell battery cable connector NOTE: For computers shipped without a WWAN card, a 4G/5G WWAN shielding cover and WWAN bracket (for 4G WWAN card) is pre-installed to the computer. As a result, follow the steps in the WWAN card removal/installation section to remove the WWAN shielding cover and WWAN bracket before removing the system board.
  • Page 73 Removing and installing components...
  • Page 74 Steps 1. Remove the screw (M2x2.5) that secures the fingerprint reader bracket in place to the system board. 2. Remove the fingerprint reader bracket from the system board. 3. Disconnect the fingerprint reader flexible printed circuits from the connectors on the system board. NOTE: The steps from 1 to 3 apply only to computers shipped with a power button with fingerprint reader installed.
  • Page 75 5. For computers shipped with 4G antennas, remove the Darwin bracket from the system board. 6. Disconnect the #1 Darwin antenna cable and #2 Darwin antenna cable from the respective connectors on the system board. 7. For systems shipped with 4G antennas, unroute the #1 Darwin antenna cable, #2 Darwin antenna cable, #6 black/gray WWAN Aux1 antenna cable and #5 white/gray WWAN Main antenna cable from the respective routing guides on the palm-rest and keyboard assembly.
  • Page 76 13. Remove the display-cable bracket from the system board. 14. Peel back the tape that secures the display cable to the system board. 15. Disconnect the following cables from the respective connectors on the system board: a. Touch-screen cable, if applicable NOTE: This step applies only to computers shipped with a touch screen installed.
  • Page 77 17. Remove the four screws (M2x2.5), the two screws (M2x4) and the two screws (M2x3) that secure the system board to the palm-rest and keyboard assembly. NOTE: This step applies only to computers shipped with a power button without fingerprint reader installed. 18.

  • Page 78: Installing The System Board

    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. 1. Fingerprint reader FPC connector 2. WWAN-card connector 3.
  • Page 79 Removing and installing components...
  • Page 80 Steps 1. Place the system board, along with the coin-cell battery, into the respective slots on the palm-rest and keyboard assembly. 2. For computers shipped with 5G antennas, adhere the 5G WWAN-card thermal pad sticker to the system board. NOTE: The 5G WWAN-card thermal pad sticker must be transferred to the new replacement system board.
  • Page 81 6. Replace the three screws (M2x2.5), the two screws (M2x4) and the two screws (M2x3) to secure the system board to the palm-rest and keyboard assembly. NOTE: This step applies only to computers shipped with a power button with fingerprint reader installed. 7.
  • Page 82 e. Speaker cable f. Audio daughter-board FFC g. Touchpad FFC h. USH daughter-board FFC, if applicable NOTE: This step applies only to computers shipped with a USH daughter-board installed. LED daughter-board FFC P-sensor cable NOTE: This step applies only to computers shipped with 5G antennas installed. 8.
  • Page 83 15. For computers shipped with 4G antennas, route the #1 Darwin antenna cable, #2 Darwin antenna cable, #6 black/gray WWAN Aux1 antenna cable and #5 white/gray WWAN Main antenna cable through the respective routing guides on the palm-rest and keyboard assembly. NOTE: When routing the WWAN-antenna cables, secure the Darwin cables and black/gray WWAN-antenna cable (for 4G WWAN configuration) in place with the sponges.
  • Page 84 Figure 6. 4G WWAN configuration Figure 7. 5G WWAN configuration 17. For computers shipped with 4G antennas, align and place the Darwin bracket into its slot on the system board. 18. For computers shipped with 4G antennas, replace the screw (M2x2.5) to secure the Darwin bracket to the system board. NOTE: The steps from 16 to 19 apply only to computers shipped with a WWAN card installed.

  • Page 85: I/O Daughter-Board

    Next steps 1. Install the thermal module. 2. Install the 3-cell battery or the 4-cell battery, whichever applicable. 3. Install the 4G WWAN card or the 5G WWAN card, whichever applicable. NOTE: This procedure applies only to computers shipped with a WWAN card installed. 4.
  • Page 86 The following image indicates the location of the I/O daughter-board and provides a visual representation of the removal procedure. Steps 1. Remove the two screws (M2x4) that secure the I/O daughter-board to the palm-rest and keyboard assembly. 2. Using a plastic scribe, pry the I/O daughter-board starting from the bottom-right side. Removing and installing components...

  • Page 87: Installing The I/O Daughter-Board

    3. Lift and remove the I/O daughter-board from the palm-rest and keyboard assembly. Installing the I/O daughter-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 location of the I/O daughter-board and provides a visual representation of the installation procedure.

  • Page 88: Power Button With Optional Fingerprint Reader

    Steps 1. Place the I/O daughter-board into its slot on the palm-rest and keyboard assembly. 2. Align the screw holes on the I/O daughter-board to the screw holes on the palm-rest and keyboard assembly. 3. Replace the two screws (M2x4) to secure the I/O daughter-board to the palm-rest and keyboard assembly. Next steps 1.

  • Page 89: Installing The Power Button With Optional Fingerprint Reader

    Steps 1. Remove the two screws (M1.6x1.7) that secure the power button with optional fingerprint reader to the palm-rest and keyboard assembly. 2. Peel off the fingerprint reader flexible printed circuits from the connector on the system. NOTE: This step applies only to computers shipped with a power button with fingerprint reader installed. 3.

  • Page 90: Keyboard

    Steps 1. Place the power button with optional fingerprint reader into its slot on the palm-rest and keyboard assembly. 2. Adhere the fingerprint reader flexible printed circuits to the connector on the system. NOTE: This step applies only to computers shipped with a power button with fingerprint reader installed. 3.
  • Page 91 2. Remove the microSIM-card tray. 3. Remove the base cover. 4. Remove the M.2 2230 solid-state drive or the M.2 2280 solid-state drive, whichever applicable. 5. Remove the 4G WWAN card or the 5G WWAN card, whichever applicable. NOTE: This procedure applies only to computers shipped with a WWAN card installed. 6.

  • Page 92: Installing The Keyboard

    Steps 1. Peel the LED daughter-board flexible flat cable from the back of the keyboard. 2. Peel the USH daughter-board flexible flat cable from the back of the keyboard. NOTE: This step applies only to computers shipped with a USH daughter-board installed. 3.
  • Page 93 Removing and installing components...
  • Page 94 Steps 1. Align the screw holes on the keyboard to the screw holes on the keyboard support plate and place the keyboard on the keyboard support plate. 2. Replace the two screws (M2x2) to secure the keyboard to the keyboard support plate. 3.

  • Page 95: Palm-Rest Assembly

    NOTE: This step applies only to computers shipped with a USH daughter-board installed. 11. Adhere the LED daughter-board flexible flat cable to the back of the keyboard. Next steps 1. Install the daughter-board. 2. Install the system board. 3. Install the thermal module.

  • Page 96: Installing The Palm-Rest Assembly

    Steps 1. For computers shipped with a carbon fiber palm-rest, use a fine-tipped instrument to push the microSIM filler outwards to remove it from its slot on the palm-rest assembly. NOTE: The microSIM filler must be transferred to the new replacement palm-rest assembly. 2.
  • Page 97 Steps 1. For computers shipped with a carbon fiber palm-rest, align and place the microSIM filler in its slot on the palm-rest assembly. NOTE: The microSIM filler must be transferred to the new replacement palm-rest assembly. 2. Place the palm-rest assembly on a flat surface and perform the post-requisites to install the palm-rest assembly. Next steps 1.

  • Page 98: 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 99: Chapter 4: Bios Setup

    BIOS 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 100: One Time Boot Menu

    Table 5. Navigation keys (continued) Keys Navigation Moves to the previous page until you view the main screen. Pressing Esc in the main screen displays a message that prompts you to save any unsaved changes and restarts the system. One time boot menu To enter one time boot menu, turn on your computer, and then press F12 immediately.
  • Page 101 Table 6. System setup options—System information menu (continued) Overview Processor Type Displays the processor type. Maximum Clock Speed Displays the maximum processor clock speed. Minimum Clock Speed Displays the minimum processor clock speed. Current Clock Speed Displays the current processor clock speed. Core Count Displays the number of cores on the processor.
  • Page 102 By default, the Video/Power only on Type-C Ports option is disabled. Type-C Dock Override Enables to use connected Type-C Dell Dock to provide data stream with external USB ports disabled. When Type-C Dock override is enabled, the Video/Audio/Lan submenu is activated.
  • Page 103 Integrated Devices By default, the Video option is disabled. Audio Enable or disable the usage of audio on Dell Dock external ports. By default, the Audio option is enabled. Enable or disable the usage of LAN on Dell Dock external ports.
  • Page 104 Table 10. System setup options—Display menu (continued) Display By default, the option is not enabled. Table 11. System setup options—Connection menu Connection Wireless Device Enable WWAN/GPS Enable or disable the internal WWAN/GPS device. By default, the option enabled. WWAN Bus Mode Set the interface type of the Wireless Wan (WWAN) card.
  • Page 105 By default, the Optimized option is enabled. USB Wake Support Wake on Dell USB-C Dock When enabled, connecting a Dell USB-C Dock will wake the system from Standby, Hibernate, and Power Off. By default, the Wake on Dell USB-C Dock option is enabled.
  • Page 106 Table 13. System setup options—Security menu (continued) Security By default, the Clear option is disabled. PPI Bypass for Clear Commands Controls the TPM Physical Presence Interface (PPI). By default, the PPI ByPass for clear Commands option is disabled. Intel Total Memory Encryption Total Memory Encryption Enable or disable you to protect memory from physical attacks including freeze spray, probing DDR to read the cycles, and others.
  • Page 107 Allow Non-Admin PSID Revert Enable Allow Non-Admin PSID Revert Controls access to the Physical Security ID (PSID) revert of NVMe hard-drives from the Dell Security Manager prompt. By default, the option is disabled. Table 15. System setup options—Update, Recovery menu...
  • Page 108 Dell Auto operating system Recovery Controls the automatic boot flow for SupportAssist System Resolution Console Threshold and for Dell operating system Recovery Tool. By default, the threshold value is set to 2. Table 16. System setup options—System Management menu System Management Service Tag Displays the Service Tag of the system.
  • Page 109 Table 17. System setup options—Keyboard menu (continued) Keyboard By default, the 10 seconds option is enabled. Device Configuration Hotkey Access Manages whether you can access device configuration screens through hotkeys during system startup. By default, the option is enabled. Table 18. System setup options—Pre-boot Behavior menu Pre-boot Behavior Adapter Warnings Enable Adapter Warnings...
  • Page 110 Table 19. System setup options—Virtualization menu (continued) Virtualization By default, the option is disabled. Table 20. System setup options—Performance menu Performance Multi Core Support Active Cores Enables to change the number of CPU cores available to the operating system. By default, the All Cores option is enabled. Intel SpeedStep Enable Intel SpeedStep Technology Enables the system to dynamically adjust processor voltage and core...

  • Page 111: Updating The Bios

    Updating the BIOS in Windows to download the latest BIOS setup program file. 2. Create a bootable USB drive. For more information, search in the Knowledge Base Resource at www.dell.com/support. 3. Copy the BIOS setup program file to the bootable USB drive.

  • Page 112: Updating The Bios From The F12 One-Time Boot Menu

    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 113: Assigning A System Setup Password

    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 password feature is disabled. Assigning a system setup password Prerequisites You can assign a new System or Admin Password only when the status is in Not Set.

  • Page 114: Clearing Bios (System Setup) And System Passwords

    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 115 To clear the alert, set the Clear Intrusion Warning to ON in the Security menu of the BIOS setup. BIOS setup...

  • Page 116: 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 117: Running The Supportassist Pre-Boot System Performance Check

    Running the SupportAssist Pre-Boot System Performance Check Steps 1. Turn on your computer. 2. As the computer boots, press the F12 key as the Dell logo appears. 3. On the boot menu screen, select the Diagnostics option. 4. Click the arrow at the bottom left corner.

  • Page 118: Lcd Power Rail Test (L-Bist)

    LCD Built-in Self Test (BIST) Dell laptops have a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with the LCD (screen) of the Dell laptop or with the video card (GPU) and PC settings.
  • Page 119 (AC, battery, coin cell) and errors drain flea power by pressing and holding down power button for 3-5 seconds. CPU failure ● Run the Dell Support Assist/Dell Diagnostics tool. ● If problem persists, replace the system board. System board failure (included ●...

  • Page 120: Recovering The Operating System

    It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its factory state. 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.

  • Page 121: Backup Media And Recovery Options

    Backup media and recovery options It is recommended to create a recovery 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...

  • Page 122: 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 25. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell app...

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