Dell Latitude 7320 Service Manual
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Dell Latitude 7320 Service Manual

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Latitude 7320
Service Manual
Regulatory Model: P133G/P134G
Regulatory Type: P133G001/P134G001
August 2021
Rev. A02

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Summary of Contents for Dell Latitude 7320

  • Page 1 Latitude 7320 Service Manual Regulatory Model: P133G/P134G Regulatory Type: P133G001/P134G001 August 2021 Rev. A02...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2021 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 on your computer................... 6 Safety instructions................................6 Service mode.................................. 6 Before working inside your computer........................8 Safety precautions................................ 9 Electrostatic discharge—ESD protection....................... 9 ESD field service kit ..............................10 Transporting sensitive components......................... 11 After working inside your computer......................... 11 Chapter 2: Removing and installing components................
  • Page 4 Deleting or changing an existing system setup password................. 75 Clearing BIOS (System Setup) and System passwords...................75 Chapter 5: Troubleshooting......................76 Handling swollen Lithium-ion batteries........................76 Dell SupportAssist Pre-boot System Performance Check diagnostics..............77 Running the SupportAssist Pre-Boot System Performance Check..............77 Contents...
  • Page 5 LCD Built-in Self Test (BIST)........................... 78 System-diagnostic lights..............................79 Recovering the operating system..........................80 Real-Time Clock (RTC Reset)............................80 Backup media and recovery options..........................81 WiFi power cycle................................81 Drain residual flea power (perform hard reset)......................81 Chapter 6: Getting help and contacting Dell................83 Contents...

  • Page 6: Chapter 1: Working On 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 3. [For models configured with an Owner Tag] When the Owner Tag information appears on the screen, press any key to proceed. NOTE: The Service Mode procedure will automatically skip this step if the Owner Tag of the system is not set up in advance by the manufacturer.

  • Page 8: Before Working Inside Your Computer

    5. When the ready-to-proceed message appears on the screen, press any key to proceed. The system emits three short beeps and shuts down immediately. Once the system shuts down, you can perform replacement procedures without disconnecting the battery cable from the system board.

  • Page 9: Safety Precautions

    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 10: Esd Field Service Kit

    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 11: Transporting Sensitive Components

    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. After working inside your computer About this task NOTE: Leaving stray or loose screws inside your computer may severely damage your computer.

  • Page 12: 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. Topics: • Recommended tools • Screw List • Major components of your system • micro-SD card • SIM card tray •...
  • Page 13 Table 1. Screw list Component Screw type Quantity Image Base cover Captive screws NOTE: Screws are part of the base cover. Solid-state drive M2x2 WWAN M2x2.5 3-cell Battery M2.5x4 Captive screws 4-cell Battery Captive screws Heatsink assembly M2x2.5 Palmrest antenna M2x2 M2x2.5 Display assembly...

  • Page 14: Major Components Of Your System

    Major components of your system 1. Base cover Removing and installing components...

  • Page 15: Micro-Sd Card

    18. Audio 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 16: Installing The Micro-Sd Card

    Installing the micro-SD card 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 micro-SD card reader slot and provides a visual representation of the installation procedure.

  • Page 17: Installing The Sim Card Tray

    Steps 1. Insert a pin into the release hole to release the SIM card tray. 2. Push the pin to disengage the lock, and eject the SIM card tray. 3. Slide the SIM card tray out of the slot on the system. 4.

  • Page 18: Base Cover

    Steps 1. Align and place the SIM card in the dedicated slot on the SIM card tray. 2. Slide the SIM card tray into the slot in the system [6], and push it to lock in place. Next steps Follow the procedure in After working on your computer.
  • Page 19 About this task Removing and installing components...

  • Page 20: Installing The Base Cover

    Steps 1. Loosen the eight captive screws that secure the base cover to the computer. 2. Use a plastic scribe to pry open the base cover, starting from the U-shaped recesses near the hinges at the top edge of the base cover.
  • Page 21 Removing and installing components...

  • Page 22: Solid-State Drive

    Steps 1. Align and place the base cover on the computer, and snap the base cover latches into place. 2. Tighten the eight captive screws to secure the base cover to the computer. Next steps 1. Install the microSD card. 2.

  • Page 23: Wwan Card

    About this task The following image indicates the location of the solid-state drive and provides a visual representation of the installation procedure. Steps 1. Align the notch on the SSD with the tab on the M.2 slot and slide the SSD into the M.2 card slot on the system board. 2.
  • Page 24 Steps 1. Using a plastic scribe, pry and remove the WWAN card shield covering the WWAN card. NOTE: Pry open the WWAN card shield from the recess. 2. Loosen the single (M2x2.5) screw and remove the WWAN-card bracket. 3. Disconnect the antenna cables from the connectors on the WWAN card. 4.

  • Page 25: Installing The Wwan Card

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

  • Page 26: 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 27: Installing The 3-Cell Battery

    About this task The following images indicate the location of the battery and provide a visual representation of the removal procedure. Steps 1. Disconnect the battery cable from the system board. 2. Disconnect the speaker cable from the speaker board and release the speaker cable from the routing guides over the upper right side of the battery.
  • Page 28 About this task The following image indicates the location of the battery and provides a visual representation of the installation procedure. NOTE: If the battery is disconnected from system board, there is delay during computer boot as the computer undergoes RTC reset.

  • Page 29: Removing The 4-Cell Battery

    Removing the 4-cell battery Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the microSD card. 3. Remove the base cover. NOTE: If the battery is disconnected from system board, there is delay during computer boot as the computer undergoes RTC reset.

  • Page 30: Heatsink Assembly

    NOTE: If the battery is disconnected from system board, there is delay during computer boot as the computer undergoes RTC reset. Steps 1. Align and place the battery into the computer. 2. Tighten the four captive screws to secure the battery in place. 3.

  • Page 31: Installing The Heatsink Assembly

    Steps 1. Disconnect the fan cable from the system board. 2. Remove the two (M2x2.5) screws on the fan case and the four (M2x2.5) screws (in reverse order, 4->3->2->1) that secure the heatsink to the computer. 3. Lift the heatsink assembly from the computer. Installing the heatsink assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 32: Palmrest Antenna Module

    Steps 1. Align and place the heatsink assembly into its slot in the computer. 2. Replace the two (M2x2.5) screws on the fan casing and four (M2x2.5) screws (in sequential order, 1->2->3->4) to secure the heatsink assembly to the computer. 3.

  • Page 33: Installing The Palmrest Antenna Module

    Steps 1. Remove the (M2x2) screw that secures the WLAN bracket to the system board. 2. Disconnect and unroute the antenna cables connected to the WLAN module on the system board. 3. Remove the two (M2x2.5) screws that secure the palmrest antenna module to the system. 4.

  • Page 34: Display Assembly

    Steps 1. Place the palmrest antenna module on the system and replace the two (M2x2.5) screws that secure it to the system. 2. Reroute the antenna cables through the routing channel and connect them to the WLAN module on the system board. 3.
  • Page 35 Removing and installing components...
  • Page 36 Steps 1. Remove the two (M2x2) securing the display cable bracket to the system board. 2. Lift to remove the display cable bracket from the computer. 3. Disconnect the display, camera, touch screen, sensor board cables from the system board and release them from cable guiding tabs.

  • Page 37: Installing The Display Assembly

    Figure 1. Display assembly with antennae cables Installing the display 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 display assembly and provides a visual representation of the installation procedure.
  • Page 38 Removing and installing components...

  • Page 39: Audio Board

    Steps 1. Align and place the display assembly at a 90º angle to the bottom chassis. 2. Replace the four (M2.5x5) screws securing the hinges to the bottom chassis. 3. Route the display cable along the guiding tabs and connect the display, camera, touch screen, sensor board cables to the system board.

  • Page 40: Installing The Audio Board

    Steps 1. Disconnect the speaker cable from the system board. 2. Disconnect and peel the audio board FFC from the system board. 3. Remove the M2x2.5 screw that secures the audio board to the computer. 4. Lift and remove the audio board from the computer. Installing the audio board Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 41: Speakers

    Steps 1. Align and replace the audio board into its slot in the computer. 2. Replace the M2x2.5 screw to secure the audio board to the computer. 3. Connect the audio board FFC to the system board. 4. Connect the speaker cable to the system board. Next steps 1.

  • Page 42: Installing The Speaker

    About this task The following images indicate the location of the speakers and provide a visual representation of the removal procedure. Steps NOTE: The speaker cable is already disconnected from the system board. Release the cable from the tabs on the palmrest assembly. 2.

  • Page 43: Smartcard Reader

    Steps 1. Replace the speaker into the slot in the computer. 2. Route the speaker cable along the cable guides on the palmrest assembly. NOTE: While replacing the speakers, route the speaker cable into the routing channels along the bottom side of the palmrest assembly.

  • Page 44: Installing The Smart Card Reader

    2. Remove the microSD card. 3. Remove the base cover. 4. Remove the battery. 5. Remove the speaker. About this task The following images indicate the location of the smart card reader and provide a visual representation of the removal procedure.
  • Page 45 About this task The following image indicates the location of the smart card reader and provides a visual representation of the installation procedure. Steps 1. Slide the smart card reader into its slot in the computer chassis and secure it using the three (M2x2.5) screws. 2.

  • Page 46: System Board

    System board Removing the system board Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the microSD card. 3. Remove the card. 4. Remove the base cover. 5. Remove the solid-state drive. 6. Remove the battery. 7.
  • Page 47 Removing and installing components...

  • Page 48: Installing The System Board

    Steps 1. Remove the M2x2.5 screw and lift the WWAN antenna cable bracket. 2. Disconnect the WWAN antenna cable and release the cable from the rubber guides on the system board. 3. Remove the single (M2x2.5) screw from the finger print reader bracket and remove the bracket from the computer. 4.
  • Page 49 Steps 1. Replace the system board into the computer chassis and tighten it using the single (M2x2.5) screw (for computer configuration with fingerprint reader on power button) or two (M2x2.5) screws (for computer configuration without fingerprint reader), two (M2x4) screws, and two (M2x3) screws securing the system board in place. 2.

  • Page 50: I/O Board

    6. Install the card. 7. Install the microSD card. 8. Follow the procedure in after working inside your computer. I/O board Removing the I/O board Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the microSD card.

  • Page 51: Installing The I/O Board

    Installing the I/O 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 board and provides a visual representation of the installation procedure. Steps 1.

  • Page 52: Installing The Power Button With Fingerprint Reader

    2. Remove the microSD card. 3. Remove the card. 4. Remove the base cover. 5. Remove the solid-state drive. 6. Remove the WWAN card. 7. Remove the battery. 8. Remove the heatsink assembly. 9. Remove the system board. About this task The following images indicate the location of the power button with fingerprint reader and provide a visual representation of the removal procedure.

  • Page 53: Keyboard

    Steps 1. Replace the power button with fingerprint reader into its slot in the computer. 2. Secure the power button with fingerprint reader to the computer using the two (M1.6x1.7) screws. Next steps 1. Install the system board. 2. Install the heatsink assembly.
  • Page 54 9. Remove the system board. 10. Remove the board. About this task The following images indicate the location of the keyboard and provide a visual representation of the removal procedure. Removing and installing components...

  • Page 55: Installing The Keyboard

    Steps 1. Peel the LED board FFC, USH board FFC, touchpad FFC and SmartCard reader FFC from the back of the keyboard. 2. Disconnect the keyboard FPC and keyboard backlight FPC from the touchpad module. 3. Remove the 18 (M1.6x1.7) screws that secure the keyboard assembly to the computer. 4.
  • Page 56 Removing and installing components...
  • Page 57 Steps 1. Align and place the keyboard on the keyboard support plate and secure it using the two (M2x2) screw. 2. Replace the keyboard assembly in to its slot in the computer. 3. Connect the keyboard FPC and keyboard backlight FPC to the touchpad module. 4.

  • Page 58: Palmrest Assembly

    Palmrest assembly Removing the palmrest assembly Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the microSD card. 3. Remove the SIM card 4. Remove the base cover. 5. Remove the solid-state drive. 6. Remove the WWAN card.
  • Page 59 Steps 1. Place the palmrest assembly on a flat surface. 2. Transfer over the components to the new palmrest assembly. Next steps 1. Install the keyboard. 2. Install the power button with finger print reader. 3. Install the board. 4. Install the system board.

  • Page 60: Chapter 3: Software

    ● Windows 10 Home, 64-bit ● Windows 10 Pro, 64-bit ● Ubuntu 20.04 LTS, 64-bit 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. Software...

  • 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

    Depending on your system and its installed devices, the items that are listed in this section may or may not appear. Table 3. System setup options—System information menu Overview Latitude 7320 BIOS Version Displays the BIOS version number. Service Tag Displays the Service Tag of the system.
  • Page 63 Table 3. System setup options—System information menu (continued) Overview Primary Displays that battery is primary. Battery Level Displays the battery level of the system. Battery State Displays the battery state of the system. Health Displays the battery health of the system. AC Adapter Displays whether the AC adapter is connected or not.
  • Page 64 Table 4. System setup options—Boot Configuration menu Boot Configuration Boot Sequence Boot mode Displays the boot mode. Boot Sequence Displays the boot sequence. Secure Digital (SD) Card Boot Enable or disable the SD card read-only boot. By default, the Secure Digital (SD) Card Boot option is not enabled. Secure Boot Enable Secure Boot Enable or disable the secure boot feature.
  • Page 65 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 66 Table 6. System setup options—Storage menu (continued) Storage By default, the Secure Digital (SD) Card Read-Only Mode option is not enabled. Table 7. System setup options—Display menu Display Display Brightness Brightness on battery power Enable to set screen brightness when the system is running on battery power. Brightness on AC power Enable to set screen brightness when the system is running on AC power.
  • Page 67 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. By default, the Wake on Dell USB-C Dock option is enabled. Block Sleep Enables to block entering sleep (S3) mode in the operating system.
  • Page 68 Table 10. System setup options—Security menu (continued) Security Clear Enables to clear the TPM owner information and returns the TPM to the default state. 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.
  • Page 69 By default, the option is enabled. 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. BIOS setup...
  • Page 70 Table 13. System setup options—System Management menu System Management Service Tag Display the Service Tag of the system. Asset Tag Create a system Asset Tag. AC Behavior Wake on AC Enable or disable the wake on AC option. By default, the option is disabled. Wake on LAN Wake on LAN Enable or disable the system to power on by special LAN signals when it...
  • Page 71 Table 15. System setup options—Pre-boot Behavior menu (continued) Pre-boot Behavior Enable Adapter Warnings Enable or disable the warning messages during boot when the adapters with less power capacity are detected. By default, the option is enabled. Warning and Errors Enable or disable the action to be done when a warning or error is encountered. By default, the Prompt on Warnings and Errors option is enabled.

  • Page 72: Updating The Bios

    For more information on this subject, see Knowledge Article: https:// www.dell.com/support/article/sln153694 Steps 1. Go to www.dell.com/support. 2. Click Product support. In the Search support box, enter the Service Tag of your computer, and then click Search. BIOS setup...

  • Page 73: Updating The Bios In Linux And Ubuntu

    8. Double-click the BIOS update file icon and follow the on-screen instructions. For more information, see knowledge base article 000124211 at www.dell.com/support. Updating the BIOS in Linux and Ubuntu To update the system BIOS on a computer that is installed with Linux or Ubuntu, see the knowledge base article 000131486 www.dell.com/support.

  • Page 74: System And Setup Password

    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 75: 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 76: 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 77: Dell Supportassist Pre-Boot System Performance Check Diagnostics

    Check diagnostics About this task SupportAssist diagnostics (also known as system diagnostics) performs a complete check of your hardware. The Dell SupportAssist Pre-boot System Performance Check diagnostics is embedded with the BIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of options for particular devices or device groups allowing you to: ●...

  • Page 78: 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 79: System-Diagnostic Lights

    (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 80: 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 81: 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 82 NOTE: For more information about performing a hard reset, see the knowledge base article SLN85632 www.dell.com/support. Troubleshooting...

  • Page 83: 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 22. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell app...

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