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Dell Latitude 3340 2-in-1 Service Manual
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Dell Latitude 3340 2-in-1 Service Manual

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Latitude 3340/Latitude 3340 2-in-1
Service Manual
Regulatory Model: P167G/P168G
Regulatory Type: P167G001/P168G001
March 2023
Rev. A00

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Summary of Contents for Dell Latitude 3340 2-in-1

  • Page 1 Latitude 3340/Latitude 3340 2-in-1 Service Manual Regulatory Model: P167G/P168G Regulatory Type: P167G001/P168G001 March 2023 Rev. A00...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2023 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 Clearing CMOS settings..............................71 Clearing BIOS (System Setup) and System passwords...................72 Chapter 5: Troubleshooting......................73 Handling swollen Lithium-ion batteries........................73 Dell SupportAssist Pre-boot System Performance Check diagnostics..............73 Running the SupportAssist Pre-Boot System Performance Check..............74 Built-in self-test (BIST)..............................74 Contents...
  • Page 5 LCD Built-in Self Test (BIST)........................... 75 System-diagnostic lights..............................75 Recovering the operating system..........................77 Real-Time Clock (RTC Reset)............................77 Backup media and recovery options..........................77 Wi-Fi power cycle................................78 Drain residual flea power (perform hard reset)......................78 Chapter 6: Getting help and contacting Dell................79 Contents...

  • 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

    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.

  • 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 3340

    The following image shows the major components of Latitude 3340. 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 12 1. Base cover 2. System board 3. Wireless card 4. Battery 5. Touchpad cable 6. Speakers 7. Palm-rest assembly 8. Display assembly 9. Touchpad 10. Power-button 11. I/O board 12. M.2 2230 solid-state drive 13. I/O cable 14. Coin cell battery 15.

  • Page 13: Base Cover

    Base cover Removing the base cover Prerequisites 1. Follow the procedure in Before working inside your computer. 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 14 Steps 1. Loosen the seven captive screws that secure the base cover to the chassis. 2. Using a plastic scribe, pry open the base cover starting from the recesses, which are located in the U-shaped indents at the bottom edge of the base cover, near the hinges. 3.

  • Page 15: Installing The Base Cover

    Installing the base cover 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 base cover and provide a visual representation of the installation procedure. Removing and installing components...

  • Page 16: Battery

    Steps 1. Place the base cover on top of the chassis. 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. Tighten the seven captive screws to secure the base cover to the chassis. Next steps 1.

  • Page 17: Removing The Battery

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

  • Page 18: Installing The Battery

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

  • Page 19: Installing The Battery Cable

    Steps 1. Unroute the battery cable from the routing guides on the battery. 2. Disconnect the battery cable from the connector on the battery. 3. Lift the battery cable away from the battery. Installing the battery cable Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the battery cable and provides a visual representation of the installation procedure.

  • Page 20: M.2 Solid-State Drive

    Steps 1. Connect the battery cable to the connector on the battery. 2. Route the battery cable through the routing guides on the battery. Next steps 1. Install the battery. 2. Install the base cover. 3. Follow the procedure in After working inside your computer.

  • Page 21: Installing The M.2 2230 Solid-State Drive

    About this task NOTE: This procedure applies only to systems shipped with a M.2 2230 solid-state drive installed. NOTE: The M.2 solid-state drive that is installed on your system depends on the configuration ordered. Supported card configurations on the M.2 solid-state drive slot are: ●...

  • Page 22: Removing The M.2 2280 Solid-State Drive

    Steps 1. Flip the M.2 2230 solid-state drive holder and align the notch on the M.2 2230 solid-state drive with the tab on the M.2 2230 solid-state drive holder. 2. Replace the single screw (M2x2) that secure the M.2 2230 solid-state drive to the M.2 2230 solid-state drive holder. 3.

  • Page 23: Installing The M.2 2280 Solid-State Drive

    Steps 1. Remove the screw (M2x3) that secures the M.2 2280 solid-state drive to the system board. 2. Slide and remove the M.2 2280 solid-state drive from the M.2 card connector on the system board. Installing the M.2 2280 solid-state drive Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 24: Wireless Card

    Steps 1. Align the notch on the M.2 2280 solid-state drive with the tab on the M.2 card connector on the system board. 2. Slide the M.2 2280 solid-state drive into the M.2 card connector on the system board. 3. Align the screw hole on the M.2 2280 solid-state drive with the screw hole on the palm-rest and keyboard assembly. 4.

  • Page 25: Installing The Wireless Card

    Steps 1. Remove the screw (M2x3) that secures wireless-card bracket to the system board. 2. Slide and remove the wireless-card bracket from the system. 3. Disconnect the WLAN-antenna cables from the respective connectors on the wireless card. 4. Lift and remove the wireless card from the wireless 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 procedure.
  • Page 26 Steps 1. Connect the WLAN-antenna cables to the respective connectors on the wireless card. NOTE: The WLAN-antenna cable connectors are fragile, and utmost care should be taken while replacing them. Table 2. WLAN-antenna cable color scheme Connectors on the wireless card Antenna-cable color Main - White triangle (△) on the wireless module of the White cable...

  • Page 27: Fan

    Next steps 1. Install the base cover. 2. Follow the procedure in After working inside your computer. Removing the thermal fan Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task NOTE: The thermal fan may become hot during normal operation.

  • Page 28: Installing The Thermal Fan

    Steps 1. Peel the mylar sheet that covers the M.2 2230 solid-state drive. NOTE: Be careful when opening the mylar sheet as it can easily rip. 2. Disconnect the thermal-fan cables from the connector on the system board. 3. Remove the two screws (M2x3) that secure the thermal fan to the system board. 4.
  • Page 29 Steps 1. Place the thermal fan into its slot on the system board. 2. Align the screw holes on the thermal fan to the screw holes on the system board. 3. Replace the two screws (M2x3) to secure the thermal fan to the system board. 4.

  • Page 30: 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. About this task NOTE: When the coin-cell battery is removed, it clears the CMOS settings. The following image indicates the location of the coin-cell battery and provides a visual representation of the removal procedure. Steps 1.

  • Page 31: Display Assembly

    Steps 1. Align and place the coin-cell battery into its slot on the palm-rest and keyboard assembly. 2. Connect the coin-cell battery cable to the connector on the system board. Next steps 1. Install the base cover. 2. Follow the procedure in After working inside your computer.
  • Page 32 Removing and installing components...

  • Page 33: Installing The Display Assembly

    Steps 1. Remove the two screws (M2.5x4) that secure the display-cable bracket in place to the system board. 2. Remove the display-cable bracket from the system board. 3. Disconnect the display cable from the connector on the system board. 4. Place the computer on a flat surface such that the palm-rest and keyboard assembly lay flat on the surface. 5.
  • Page 34 Steps 1. Place the display assembly on a flat surface. 2. Slide the display assembly at an angle and place the system chassis under the hinges of the display 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 35: 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 The following images indicate the location of the I/O board and provide a visual representation of the removal procedure. CAUTION: The system has a coin-cell battery that is connected to the I/O board.

  • Page 36: 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 images indicate the location of the I/O board and provide a visual representation of the installation procedure. CAUTION: The system has a coin-cell battery that is connected to the I/O board.

  • Page 37: Power-Button Board

    Power-button board Removing the power button Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the board. About this task The following images indicate the location of the power button and provide a visual representation of the removal procedure. Steps 1.

  • Page 38: Power Button With Optional Fingerprint Reader

    Steps 1. Align and place the power button into its slot on the palm-rest and keyboard assembly. 2. Align the screw hole on the power button to the screw hole on the palm-rest and keyboard assembly. 3. Replace the screw (M2x2) to secure the power button to the palm-rest and keyboard assembly. Next steps 1.

  • Page 39: Installing The Power Button With Optional Fingerprint Reader

    Steps 1. Remove the screw (M2x3) that secures 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 power button. 3. Remove the power button with optional fingerprint reader from the slot on the palm-rest and keyboard assembly. Installing the power button with optional fingerprint reader Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 40: Touchpad

    Steps 1. Align and 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 power button. 3. Align the screw hole on the power button with optional fingerprint reader to the screw hole on the palm-rest and keyboard assembly.
  • Page 41 3. Remove the battery. About this task The following images indicate the location of the touchpad and provide a visual representation of the removal procedure. Steps 1. Open the latch and disconnect the touchpad cable from the connector on the system board. Removing and installing components...

  • Page 42: Installing The Touchpad

    2. Open the latch and disconnect the keyboard-cable from the connector on the touchpad module. 3. Open the latch and disconnect the keyboard backlight-cable from the connector on the touchpad. 4. Partially peel and lift up the adhesive shielding cover from over the touchpad. 5.
  • Page 43 Steps 1. Align and place the touchpad module into the slot on the palm-rest and keyboard assembly. 2. Align the screw holes on the touchpad module to the screw holes on the palm-rest and keyboard assembly. 3. Replace the six screws (M2x2) to secure the touchpad module to the palm-rest and keyboard assembly. 4.

  • Page 44: Power-Adapter Port

    6. Connect the keyboard-cable to the connector on the touchpad module close the latch. 7. Connect the touchpad cable to the connector on the system board and close the latch. Next steps 1. Install the battery. 2. Install the base cover.

  • Page 45: Installing The Power-Adapter Port

    Installing the power-adapter port 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 power-adapter port and provide a visual representation of the installation procedure.

  • Page 46: Installing The Speakers

    About this task The following images indicate the location of the speakers and provide a visual representation of the removal procedure. Steps 1. Disconnect the I/O board-cable from the connector on the system board. 2. Disconnect the speaker cable from the connector on the system board. 3.
  • Page 47 Steps 1. Align and place the speakers in the slot on the chassis. 2. Route the speaker cables through the routing guides on the palm-rest and keyboard assembly. 3. Connect the speaker cable to the connector on the system board. 4.

  • Page 48: Heat Sink

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

  • Page 49: System Board

    About this task NOTE: If either the system board or the heat-sink 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 heat-sink and provides a visual representation of the installation procedure. Steps 1.
  • Page 50 About this task The following image indicates the connectors on your system board. Figure 1. System-board connectors 1. Fan cable connector 2. Display cable connector 3. DC-in port connector 4. WLAN card connector 5. Touchpad cable connector 6. Battery cable connector 7.
  • Page 51 CAUTION: The system has a coin-cell battery that is connected to the I/O board. Disconnecting the I/O board cable resets the BIOS setup program settings to default. Note the BIOS setup program settings before disconnecting the I/O board cable. Steps 1.

  • Page 52: Installing The System Board

    2. Remove the display-cable bracket from the system board. 3. Remove the two screws (M2.5x4) that secure the right display hinge to the system board. 4. Lift the right display hinge in upward direction away from the system board. 5. Remove the screw (M2.5x4) that secures the USB type-C bracket to the system board. 6.
  • Page 53 CAUTION: The system has a coin-cell battery that is connected to the I/O board. Disconnecting the I/O board cable resets the BIOS setup program settings to default. Note the BIOS setup program settings before disconnecting the I/O board cable. Steps 1.

  • Page 54: Palm-Rest And Keyboard Assembly

    2. Align the screw holes on the system board with the screw holes on the palm-rest and keyboard assembly. 3. Replace the two screws (M2x2) to secure the system board to the palm-rest and keyboard assembly. 4. Connect the following cables to the respective connectors on the system board: a.

  • Page 55: Installing The Palm-Rest And Keyboard Assembly

    About this task NOTE: The palm-rest assembly cannot be further disassembled once all the pre-removal parts procedures are completed. If the keyboard is malfunctioning and is required to be replaced, replace the entire palm-rest assembly. The image below shows the palm-rest assembly after the pre-removal parts procedures have been performed for any palm-rest assembly replacement.
  • Page 56 Steps Place the palm-rest and keyboard assembly on a flat surface and perform the post-requisites to install the palm-rest and keyboard assembly. Next steps 1. Install the power-adapter port. 2. Install the system board. NOTE: The system board can be installed with the thermal heat-sink attached to it in order to simplify the procedure and preserve the thermal bond between the system board and the thermal heat-sink.

  • Page 57: Chapter 3: Drivers And Downloads

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

  • Page 58: 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 59: One Time Boot Menu

    The one-time boot menu displays the devices that you can boot from including the diagnostic option. The boot menu options are: ● Removable Drive (if available) ● STXXXX Drive (if available) NOTE: XXX denotes the SATA drive number. ● Optical Drive (if available) ●...
  • Page 60 Table 4. System setup options—System information menu (continued) Overview AC Adapter Displays whether the AC adapter is connected or not. Battery Life Type Displays the battery life type of the system. Processor Information Processor Type Displays the processor type. Maximum Clock Speed Displays the maximum processor clock speed.
  • Page 61 Table 5. System setup options—Boot Configuration menu (continued) Boot Configuration By default, the option is enabled. Secure Boot Mode Enable or disable to change the secure boot mode options. By default, the Deployed Mode is enabled. Expert Key Management Enable Custom Mode Enable or disable custom mode.
  • Page 62 Table 7. System setup options—Storage menu (continued) Storage Enable SMART Reporting Enable or disable Self-Monitoring, Analysis, and Reporting Technology (SMART) during system startup. By default, the Enable SMART Reporting option is not enabled. Drive Information M.2 PCIe SSD Type Displays the M.2 PCIe SSD type information of the system. Device Displays the M.2 PCIe SSD device information of the system.
  • Page 63 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 64 Table 11. System setup options—Security menu (continued) Security By default, the SHA-256 option is enabled. 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).
  • Page 65 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 13. System setup options—Update, Recovery menu...
  • Page 66 By default, the option is enabled. Dell Auto OS Recovery Threshold Controls the automatic boot flow for SupportAssist System Resolution Console and for Dell operating system Recovery Tool. By default, the threshold value is set to 2. Table 14. System setup options—System Management menu...
  • Page 67 Table 16. System setup options—Pre-boot Behavior menu (continued) Pre-boot Behavior 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. USB-C Warnings Enable Dock Warning Messages By default, the option is enabled.

  • Page 68: Updating The Bios

    For more information on this subject, search in the Knowledge Base Resource at www.dell.com/support. 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. NOTE: If you do not have the Service Tag, use the SupportAssist feature to automatically identify your computer.

  • Page 69: Updating The Bios In Linux And Ubuntu

    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 70: System And Setup Password

    ● 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 71: Deleting Or Changing An Existing System Setup Password

    2. Select System/Admin Password and create a password in the Enter the new password field. Use the following guidelines to assign the system password: ● A password can have up to 32 characters. ● At least one special character: ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ●...

  • Page 72: 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 73: 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 74: 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 75: 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 76 (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 77: 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 78: Wi-Fi Power Cycle

    6. Install the battery. 7. Install the base cover. 8. Connect the power adapter to your computer. 9. Turn on your computer. NOTE: For more information about performing a hard reset, search in the Knowledge Base Resource at www.dell.com/ support. Troubleshooting...

  • Page 79: 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 23. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com Tips Contact Support In Windows search, type Contact Support, and press Enter.

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