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Dell Inspiron 16 7620 Service Manual
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Dell Inspiron 16 7620 Service Manual

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Inspiron 16 7620 2-in-1
Service Manual
Regulatory Model: P119F
Regulatory Type: P119F001
February 2022
Rev. A00

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Summary of Contents for Dell Inspiron 16 7620

  • Page 1 Inspiron 16 7620 2-in-1 Service Manual Regulatory Model: P119F Regulatory Type: P119F001 February 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 Safety instructions................................5 Before working inside your computer........................5 Safety precautions................................ 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................................
  • Page 4 Updating the BIOS from the F12 One-Time boot menu..................68 Chapter 5: Troubleshooting......................70 Handling swollen Lithium-ion batteries........................70 Locate the Service Tag or Express Service Code of your Dell computer ..........70 System diagnostic lights..............................71 SupportAssist diagnostics............................... 72 Built-in self-test (BIST)..............................72 Recovering the operating system..........................72...

  • Page 5: 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 6: 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 7: 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 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 screwdriver #0 Screw list NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and then place them in a screw storage box.

  • Page 10: Major Components Of Inspiron 7620 2-In-1

    Table 1. Screw list (continued) Component Screw type Quantity Screw image Heat sink with discrete Captive screw graphics I/O board M2x3 Power-button board M2x3 Power-button with M2x2.5 fingerprint reader Display hinges M2.5x4 Display board M2x2 USB Type-C bracket M2x4 System board M2x2 System board M2x3...
  • Page 11 1. Base cover 2. Display board 3. Memory 4. System board 5. Front speakers 6. Side speakers 7. 2280 solid-state drive 8. 2230 solid-state drive 9. Battery 10. Palm-rest and keyboard assembly 11. Display assembly 12. Side-speaker board 13. Coin-cell battery 14.

  • Page 12: Disassembly And Reassembly

    18. Power-button with fingerprint reader 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 Steps 1. Remove the six screws (M2x4) that secure the base cover to the palm-rest and keyboard assembly. 2. Loosen the three captive screws (M2x7.5) that secure the base cover to the palm-rest and keyboard assembly. Removing and installing components...
  • Page 14 3. Using your fingers pry the base cover from the gap at the bottom left and continue to work on the sides to open the base cover. 4. Lift and slide 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 process.

  • Page 15: Memory

    Steps 1. Place and snap the base cover into place on the palm-rest and keyboard assembly. 2. Tighten the three captive screws(M2x7.5) that secure the base cover to the palm-rest and keyboard assembly. 3. Replace the six screws (M2x4) that secure the base cover to the palm-rest and keyboard assembly. Next steps 1.
  • Page 16 Steps 1. Lift the Mylar to access the memory module. 2. Using your fingertips, carefully spread apart the securing-clips on each end of the memory-module slot until the memory module pops-up. 3. Remove the memory module from the memory-module slot on the system board. NOTE: Your computer may have up to two memory modules installed.
  • Page 17 Steps 1. Lift the Mylar to access the memory-module slot. 2. Align the notch on the memory module with the tab on the memory-module slot on the system board. 3. Slide the memory module into the memory-module slot on the system board. 4.

  • Page 18: Solid-State Drive

    Solid-state drive Removing the 2230 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 an M.2 2230 solid-state drive installed. NOTE: The M.2 card installed will depend on the configuration ordered.
  • Page 19 About this task NOTE: This procedure applies if you are installing a M.2 2230 solid-state drive. NOTE: Supported card configurations: ● M.2 2230 solid-state drive + M.2 2230 mounting bracket ● M.2 2280 solid-state drive The following image(s) indicate the location of the 2230 solid-state drive and provides a visual representation of the installation procedure.
  • Page 20 NOTE: The M.2 card installed will depend on the configuration ordered. Supported card configurations on the M.2 card slot: ● M.2 2230 solid-state drive + M.2 2230 mounting bracket ● M.2 2280 solid-state drive The following image(s) indicate the location of the 2280 solid-state drive and provides a visual representation of the removal procedure.

  • Page 21: Wireless Card

    Steps 1. Align the notch on the M.2 2280 solid-state drive with the tab on the M.2 card slot on the system board. 2. Slide the M.2 2280 solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x3) that secures the M.2 2280 solid-state drive to the system board. Next steps 1.
  • Page 22 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 M.2 card slot on the system board. Installing the wireless card Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
  • Page 23 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. Antenna-cable color scheme Connectors on the Antenna-cable color Silkscreen marking wireless card △...

  • Page 24: Fan

    Removing the fan Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task The following image(s) indicate the location of the fan and provides a visual representation of the removal procedure. Steps 1.

  • Page 25: Side Speakers

    Steps 1. Place the fan on the palm-rest and keyboard assembly. 2. Align the screw holes on the fan to the screw holes on the palm-rest and keyboard assembly. 3. Replace the two screws (M2x3) that secure the fan to the palm-rest and keyboard assembly. 4.
  • Page 26 Steps 1. Lift the latch and disconnect the keyboard-backlight cable from the system board. 2. Lift the latch and disconnect the keyboard cable from the system board. 3. Lift the latch and disconnect the touchpad cable from the system board. 4.

  • Page 27: Front Speakers

    Steps 1. Using the alignment posts, place the side speakers on the palm-rest and keyboard assembly. NOTE: Ensure that the alignment posts are threaded through the rubber grommets on the speaker. 2. Route the side-speaker cable through the routing guides on the palm-rest and keyboard assembly. 3.
  • Page 28 About this task NOTE: This procedure only applies for computers shipped with a 4-cell battery (64 Wh) installed. The following image(s) indicate the location of the front speakers, 4-cell battery (64 Wh) and provides a visual representation of the removal procedure. Steps 1.
  • Page 29 Steps 1. Using the alignment posts, place the front speakers on the palm-rest and keyboard assembly. NOTE: Ensure that the alignment posts are threaded through the rubber grommets on the speaker. 2. Route the front-speaker cable through the routing guides on the system board and palm-rest and keyboard assembly. 3.
  • Page 30 Steps 1. Disconnect the front-speaker cable from the system board. 2. Remove the front-speaker cable from the routing guides on the system board and palm-rest and keyboard assembly. 3. Peel the tapes securing the front-speaker cable to the palm-rest and keyboard assembly. 4.

  • Page 31: Coin-Cell Battery

    Steps 1. Using the alignment posts, place the front speakers on the palm-rest and keyboard assembly. NOTE: Ensure that the alignment posts are threaded through the rubber grommets on the speaker. 2. Route the front-speaker cable through the routing guides on the system board and palm-rest and keyboard assembly. 3.
  • Page 32 Steps 1. Lift the latch and disconnect the I/O-board cable from the I/O board. 2. Move the I/O-board cable off the coin-cell battery. 3. Disconnect the coin-cell battery from the I/O board. 4. Peel and remove the coin-cell battery from 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 process.

  • Page 33: Battery

    Steps 1. Place and adhere the coin-cell battery to the palm-rest and keyboard assembly. 2. Connect the coin-cell battery cable to the I/O board. 3. Move the I/O-board cable over the coin-cell battery. 4. Connect the I/O-board cable to the I/O board and close the latch. Next steps 1.
  • Page 34 ● 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 35 About this task NOTE: This procedures only applies if you are installing a 4-cell battery (64 Wh) into your computer. The following image(s) indicate the location of the 4-cell battery (64 Wh) and provides a visual representation of the installation procedure.
  • Page 36 Steps 1. Disconnect the battery cable from the system board. NOTE: This step is applicable only if the battery cable has not been disconnected. 2. Remove the six screws (M2x3) that secure the 6-cell battery to the palm-rest and keyboard assembly. 3.

  • Page 37: Heat Sink

    Steps 1. Using the alignment posts, place the 6-cell battery on the palm-rest and keyboard assembly. 2. Align the screw holes on the 6-cell battery with the screw holes on the palm-rest and keyboard assembly. 3. Replace the six screws (M2x3) that secure the 6-cell battery to the palm-rest and keyboard assembly. 4.
  • Page 38 Steps 1. Peel off the Mylar that covers the heat sink. 2. In reverse sequential order (4>3>2>1), loosen the four captive screws that secure the heat sink to the system board. 3. Lift the heat sink off the system board. CAUTION: Do not use an alcohol wipe to clean the thermal grease, the alcohol solution from the wipes will dissolve the Element 31 grease into conductive metal particles.
  • Page 39 Steps 1. Place the heat sink on the system board. 2. Align the captive screws on the heat sink to the screw holes on the system board. 3. In sequential order (1>2>3>4), tighten the four captive screws that secure the heat sink to the system board. 4.
  • Page 40 Steps 1. Peel off the Mylar that covers the heat sink. 2. In reverse sequential order (7>6>5>4>3>2>1), loosen the seven captive screws that secure the heat sink to the system board. 3. Lift the heat sink off the system board. CAUTION: Do not use an alcohol wipe to clean the thermal grease, the alcohol solution from the wipes will dissolve the Element 31 grease into conductive metal particles.
  • Page 41 About this task NOTE: If either the system board or the fan and heat-sink assembly is replaced, use the thermal grease provided in the kit to ensure that thermal conductivity is achieved. NOTE: This procedure only applies if you are installing a heat sink for a computer with a discrete graphics processor. The following image(s) indicate the location of the heat sink with discrete graphics and provides a visual representation of the installation procedure.

  • Page 42: I/O Board

    I/O board Removing the I/O board Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task NOTE: Removing the I/O board is equivalent to removing the coin-cell battery. It resets the BIOS setup program's settings to default.

  • Page 43: Power-Button Board

    About this task The following image(s) indicate the location of the I/O board and provides a visual representation of the installation procedure. Steps 1. Place the I/O board on the palm-rest and keyboard assembly. 2. Align the screw holes on the I/O board with the screw holes on the palm-rest and keyboard assembly. 3.
  • Page 44 About this task The following image(s) indicate the location of the power-button 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 system board. 2. Pry open the left-display hinge at an angle of 90 degrees. 3.

  • Page 45: Power Button With Fingerprint Reader

    Steps 1. Place the power-button board on the palm-rest and keyboard assembly. 2. Align the screw holes on the power-button board with the screw holes on the palm-rest and keyboard assembly. 3. Replace the two screws (M2x3) that secure the power-button board to the palm-rest and keyboard assembly. 4.
  • Page 46 Steps 1. Remove the two screws (M2x2.5) that secure the power-button with fingerprint reader to the palm-rest and keyboard assembly. 2. Lift the power-button with fingerprint reader off the palm-rest 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 process.

  • Page 47: Display Assembly

    Steps 1. Using the alignment posts, place the power-button with fingerprint reader on the palm-rest and keyboard assembly. 2. Replace the two screws (M2x2.5) that secure the power-button with fingerprint reader to the palm-rest and keyboard assembly. Next steps 1. Install the power-button board.
  • Page 48 Steps 1. Remove the two screws (M2.5x4) that secure the left-display hinge to the system board. 2. Pry open the left-display hinge at an angle of 90 degrees. 3. Remove the three screws (M2.5x4) that secure the right-display hinge to the I/O board. 4.
  • Page 49 Installing the display assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following image(s) indicate the location of the display assembly and provides a visual representation of the installation procedure.

  • Page 50: Display Board

    CAUTION: To avoid damaging the display, do not slide the palm-rest and keyboard assembly over the display assembly. 3. Connect the display cable to the connector on the system board and close the latch. 4. Adhere the tape that secures the display-cable connector latch to the system board. 5.

  • Page 51: System Board

    3. Lift the display board off the palm-rest and keyboard assembly. Installing the display board Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following image(s) indicate the location of the display board and provides a visual representation of the installation procedure.
  • Page 52 5. Remove the wireless card. 6. Remove the heat sink without discrete graphics heat sink with discrete graphics, whichever applicable. 7. Remove the display board. About this task The following image indicates the connectors on your system board. 1. Display-backlight cable connnector 2.
  • Page 53 Steps 1. Lift the latch and disconnect the display-backlight cable from the system board. 2. Peel the tape that secures the display-backlight cable off the system board. 3. Remove the three screws (M2.5x4) that secure the right-display hinge to the I/O board. 4.
  • Page 54 14. Disconnect the battery cable from the system board. 15. Disconnect the front-speaker cable from the system board. 16. Remove the front-speaker cable from the routing guides on the system board. 17. Using the pull tab, disconnect the side-speaker board cable from the system board. 18.
  • Page 55 9. I/O-board cable connector 10. Fan-cable connector The following image(s) indicate the location of the system board and provides a visual representation of the installation procedure. Steps 1. Place the system board on the palm-rest and keyboard assembly. 2. Align the screw holes on the system boad with the screw holes on the palm-rest and keyboard assembly. 3.

  • Page 56: Palm-Rest And Keyboard Assembly

    10. Connect the front-speaker cable to the system board. 11. Route the front-speaker cable through the routing guides on the system board. 12. Connect the battery cable to the system board. 13. Adhere the tape that secures the battery cable to the system board. 14.
  • Page 57 About this task NOTE: The palm-rest and keyboard assembly comes pre-assembled with the following components, when one of these components need to replaced, replace the entire assembly. ● palm rest ● keyboard ● wireless-antenna modules ● touchpad The following image(s) indicate the location of the palm-rest and keyboard assembly and provides a visual representation of the removal procedure.
  • Page 58 Steps After performing 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 process. About this task NOTE: The replacement palm-rest and keyboard assembly comes pre-assembled with the following components.
  • Page 59 Steps Place the palm-rest and keyboard assembly on a flat and clean surface and perform the post-requisites to install the palm-rest and keyboard assembly. NOTE: The replacement palm-rest and keyboard assembly will come with all four battery-screw brackets installed. Depending on the battery configuration of your computer, slide and remove two of the four battery-screw brackets from the palm-rest and keyboard assembly to replicate the configuration shown in the images above.

  • Page 60: 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 61: 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 62: One Time Boot Menu

    Table 3. 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 63 Table 4. 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 64 Table 5. System setup options—Boot Configuration menu (continued) Boot Configuration Enable Secure Boot Enables secure boot using only validated boot software. Default: OFF Secure Boot Mode Modifies the behavior of Secure Boot to allow evaluation or enforcement of UEFI driver signatures. Deployed Mode should be selected for normal operation of Secure Boot.
  • Page 65 Enables or disables cloud Service OS recovery if the main OS fails to boot within the number of failures equal or greater than the value specified by Dell Auto OS Recovery Threshold, and local Service does not boot, or is not installed.

  • Page 66: System And Setup Password

    Table 11. System setup options—System Management menu (continued) System Management Asset Tag Creates a system Asset Tag that can be used by an IT administrator to uniquely identify a particular system. Once set in BIOS, the Asset Tag cannot be changed. Table 12.

  • Page 67: Assigning A System Setup Password

    6. Press Y to save the changes and exit from System Setup. The computer restarts. 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. BIOS setup...

  • Page 68: 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 69 ● 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 70: 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 71: 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 72: 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 73: 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 74: 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 17. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell app...

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