Dell Latitude 9520 Series Service Manual
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Dell Latitude 9520 Series Service Manual

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Latitude 9520
Service Manual
Regulatory Model: P94F/P95F
Regulatory Type: P94F002/P95F002
March 2021
Rev. A00

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Summary of Contents for Dell Latitude 9520 Series

  • Page 1 Latitude 9520 Service Manual Regulatory Model: P94F/P95F Regulatory Type: P94F002/P95F002 March 2021 Rev. A00...
  • 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 Before working inside your computer........................6 Service mode.................................. 7 Safety precautions................................ 8 Electrostatic discharge—ESD protection....................... 9 ESD field service kit ..............................9 After working inside your computer........................10 Chapter 2: Removing and installing components................11 Recommended tools................................11 Screw list....................................
  • Page 4 Removing the power button with fingerprint reader..................35 Installing the power button with fingerprint reader.................... 36 Battery....................................37 Removing the 4-cell battery............................. 37 Installing the 4-cell battery............................38 Removing the 6-cell battery............................. 40 Installing the 6-cell battery............................40 Smart card reader................................41 Removing the smart card reader..........................41 Installing the smart card reader..........................
  • Page 5 Assigning a system setup password........................81 Deleting or changing an existing system setup password.................82 Chapter 5: Troubleshooting......................83 Dell SupportAssist Pre-boot System Performance Check diagnostics..............83 Running the SupportAssist Pre-Boot System Performance Check..............83 Diagnostics..................................84 Diagnostic error messages..............................85 System error messages..............................88 Wi-Fi power cycle................................89 Chapter 6: Getting help.......................90...

  • 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: Service Mode

    4. Disconnect all attached network devices and peripherals, such as keyboard, mouse, and monitor from your computer. 5. Remove any media card and optical disc from your computer, if applicable. 6. After the computer is unplugged, press and hold the power button for 5 seconds to ground the system board. CAUTION: Place the computer on a flat, soft, and clean surface to avoid scratches on the display.

  • Page 8: Safety Precautions

    NOTE: If the AC adapter is not disconnected from the system, a message prompting you to remove the AC adapter is displayed on the screen. 5. Once the system has powered down, you can proceed to perform replacement procedures. 6. To exit Service Mode connect the AC adapter and press the power button to power on the system. The system will boot up and return to normal functioning mode.

  • Page 9: Electrostatic Discharge-Esd Protection

    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: After Working Inside Your Computer

    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: Chapter 2: Removing And Installing Components

    Removing and installing components Topics: • Recommended tools • Screw list • Major components of your system • SIM card tray • MicroSD card • Base cover • WWAN card • Solid-state drive • Speakers • System fan • I/O daughter board power cable •...
  • Page 12 Table 1. Latitude 9520 screw list Component Screw type Quantity Image 4-cell battery M1.6x3.5 M2x3 6-cell battery M1.6x3.5 M2x3 WWAN Captive screw M1.6x4.5 Smart card reader M2x2 Solid-state drive M2x2 Speaker M1.6x1.8 I/O board M1.6x3.5 System fan M2x3 Display cable bracket M1.6x3.5 Display assembly M2.5x5...

  • Page 13: Major Components Of Your System

    Table 1. Latitude 9520 screw list Component Screw type Quantity Image M2.5x5 M1.6x4.5 Keyboard M1.6x2 M1.6x1.5 Major components of your system 1. Base cover 2. Solid-state drive shield 3. Solid-State drive 4. WWAN shield 5. WWAN Card 6. System board Removing and installing components...

  • Page 14: Sim Card Tray

    7. Smart card reader 8. Palmrest 9. Display assembly 10. Keyboard 11. I/O board 12. System fan 13. Battery 14. Speakers SIM card tray Removing the SIM card tray Prerequisites Follow the procedure in before working inside your computer. About this task The following image provides a visual representation of the SIM card tray removal procedure.

  • Page 15: Installing 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. Remove the Micro-SIM from the SIM tray. 5. Slide the SIM card tray back into the slot on the system. Installing the SIM card tray Prerequisites If you are replacing a component, remove the necessary component before the installation procedure.

  • Page 16: Microsd Card

    Next steps Follow the procedure in After working on your computer. MicroSD card Removing the microSD card Prerequisites Follow the procedure in before working inside your computer. About this task The following image provides a visual representation of the microSD card removal procedure. Steps 1.

  • Page 17: Base Cover

    Steps Insert the microSD card into its slot until it clicks into place. Next steps 1. Follow the procedure in After working on your computer. Base cover Removing the base cover Prerequisites 1. Follow the procedure in before working inside your computer.
  • Page 18 About this task Removing and installing components...

  • Page 19: Installing The Base Cover

    Steps 1. Loosen the nine captive screws that secure the base cover to the system. 2. Using a plastic scribe, pry open the base cover starting from the recesses located in the U-shaped indents near the hinges at the top edge of the base cover. NOTE: Do not pull the base cover from the top side immediately after prying it from the recesses, as this will cause damage to the base cover.

  • Page 20: Wwan Card

    Steps 1. Align and place the base cover on the palmrest and keyboard assembly, and snap the base cover into place. 2. Tighten the nine captive screws to secure the base cover to the system. Next steps 1. Install the SIM card tray.

  • Page 21: Installing The Wwan Card

    About this task The following images indicate the location of the WWAN card and provide a visual representation of the removal procedure. Steps 1. Using a plastic scribe, pry open the WWAN card shield covering the WWAN card. 2. Loosen the single captive screw that secures the WWAN-card bracket to the WWAN card. 3.
  • Page 22 Steps 1. Align the notch on the WWAN card with the tab on the WWAN-card slot. NOTE: If any of the thermal pads located underneath the WWAN card are detached from the system board when removing the WWAN card from the system, adhere them back on the system board. Removing and installing components...

  • Page 23: Solid-State Drive

    2. Slide the WWAN card at an angle into the WWAN-card slot. 3. Connect the antenna cables to the connectors on the WWAN card. 4. Align and place the WWAN-card bracket on the system board and WWAN card, and tighten the single captive screw. 5.

  • Page 24: Installing The Solid-State Drive

    Steps 1. Using a plastic scribe, pry open the solid-state drive shield and lift it out of the system. 2. Remove the single screw (M2x2) that secures the solid-state drive to the system board. 3. Slide and remove the solid-state drive from the solid-state drive slot on the system board. Installing the solid-state drive Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 25: Speakers

    Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card connector. 2. Slide the solid-state drive into the M.2 card connector on the system board. 3. Replace the screw (M2x2) that secures the solid-state drive to the system board. 4.

  • Page 26: Installing The Speaker

    4. Enter service mode. 5. Remove the base cover. About this task The following images indicate the location of the speaker and provide a visual representation of the removal procedure. Steps 1. Peel off the adhesive tape and disconnect the battery cable from the system board. 2.
  • Page 27 About this task The following image indicates the location of the speaker and provides a visual representation of the installation procedure. Steps 1. Align and place the speakers in the slot on the system. 2. Replace the four (M1.6x1.8) screws that secure the speakers to the system. 3.

  • Page 28: System Fan

    System fan Removing the system fan Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the microSD card. 3. Remove the SIM card tray. 4. Enter service mode. 5. Remove the base cover. About this task The following images indicate the location of the system fan and provide a visual representation of the removal procedure.

  • Page 29: I/O Daughter Board Power Cable

    Steps 1. Align and place the system fan onto the palmrest assembly. 2. Replace the three (M2x3) screws that secure the system fan in place. 3. Connect the system fan cable to the connector on the system board. 4. Route the I/O daughter board cable through the routing guides on the system fan. 5.

  • Page 30: Installing The I/O Daughter Board Cable

    Steps 1. Disconnect the battery cable from the connector on the system board. 2. Disconnect the I/O daughter board cable from the I/O board, and system board. 3. Unroute the I/O daughter board cable from the routing channels on to the system fan. 4.

  • Page 31: I/O Daughter Board

    Steps 1. Route the I/O daughter board cable on the routing channels on to the system fan. 2. Connect the I/O daughter board cable to the I/O daughter board, and system board. 3. Reconnect the battery cable to the connector on the system board. Next steps 1.

  • Page 32: Installing The I/O Board

    Steps 1. Disconnect the I/O daughter board data cable, fingerprint reader cable, and LED board cable from the I/O board. 2. Remove the four (M1.6x3.5) screws and lift the I/O daughter board out of the system. Installing the I/O board Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 33: Power Button

    Steps 1. Align and place the I/O board on the system. 2. Replace the four (M1.6x3.5) screws to secure the I/O daughter board in place. 3. Connect the LED board cable, fingerprint reader cable, and I/O daughter board data cable to the connectors on the I/O board.

  • Page 34: Installing The Power Button

    Steps 1. Remove the three (M2.5x5) screws that secures the display hinge to the chassis and fold the hinge up. 2. Remove the three (M1.5x2.5) screws from the power button bracket and remove the bracket from the system. 3. Peel off the power button assembly from the palm rest and remove the power button assembly from the system. Installing the power button Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 35: Power Button With Finger Print Reader (Optional)

    Steps 1. Align and place the power button assembly on the system. Adhere the power button assembly on the palmrest. 2. Place the power button bracket on the power button assemby and install the three (M1.5x2.5) screws. 3. Fold back the display hinge and install the three (M2.5x5) screws to secure it. Next steps 1.

  • Page 36: Installing The Power Button With Fingerprint Reader

    Steps 1. Remove the three (M2.5x5) screws that secures the display hinge to the chassis and fold the hinge up. 2. Remove the three (M1.5x2.5) screws from the power button bracket and remove the bracket from the system. 3. Peel off the power button with fingerprint reader assembly from the palm rest and remove it from the system. Installing the power button with fingerprint reader Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 37: Battery

    Steps 1. Align and place the power button with fingerprint reader assembly on the system and adhere it to the palmrest. 2. Align and place the power button with fingerprint reader bracket in place, and install the three (M1.5x2.5) screws. 3.

  • Page 38: Installing The 4-Cell Battery

    Steps 1. Peel off the adhesive tape that secures the wireless antenna cables in place and unroute the wireless antenna cables from the routing guides. NOTE: The cables for the wireless antennas are routed over the plastic bracket at the upper right corner and within the routing channels along the bottom right side of the battery.
  • Page 39 About this task The following image indicates the location of the battery and provides a visual representation of the installation procedure. NOTE: If battery was disconnected from system board for service, there will be a delay during system boot-up as the system will undergo RTC battery reset.

  • Page 40: Removing The 6-Cell Battery

    Removing the 6-cell battery Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the microSD card. 3. Remove the SIM card tray. 4. Remove the base cover. 5. Remove the speakers. About this task The following images indicate the location of the battery and provide a visual representation of the removal procedure. NOTE: If battery was disconnected from system board for service, there will be a delay during system boot-up as the system will undergo RTC battery reset.

  • Page 41: Smart Card Reader

    NOTE: If battery was disconnected from system board for service, there will be a delay during system boot-up as the system will undergo RTC battery reset. Steps 1. Align and place the battery on the palmrest and keyboard assembly. 2. Install the single (M1.6x3.5) and eight (M2x3) screws to secure the battery in place. 3.

  • Page 42: Installing The Smart Card Reader

    About this task Steps 1. Open the latch and disconnect the touchpad FPC from the system board. 2. Open the latch and disconnect the smart card reader cable from the I/O-daughter board. 3. Remove the two screws (M2x2) that secure the smart card reader to the palmrest assembly. 4.
  • Page 43 About this task Steps 1. Align and place the smart card reader on the palmrest assembly. 2. Replace the two screws (M2x2) to secure the smart card reader to the palmrest assembly. 3. Connect the smart card reader cable to the connector on the I/O-daughter board and close the latch. 4.

  • Page 44: 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 SIM card tray. 4. Remove the base cover. 5. Remove the solid-state drive. 6. Remove the WWAN card.
  • Page 45 NOTE: Replacement system boards are pre-assembled with heat sink. Do not remove the heat sink from system board. The system board can be replaced together with the heat sink attached. Steps 1. Remove the single (M1.6x3.5) screw that secures the display-cable bracket to the system board. Removing and installing components...

  • Page 46: Installing The System Board

    2. Push the display-cable bracket from the bottom edge to release the bracket from the securing peg, and remove it from the system. 3. Disconnect the display cable and camera cable from the system board. NOTE: Users must disconnect the display cable from the system board by pulling the pull tab in a direct upward motion to prevent damage to the connector.
  • Page 47 Removing and installing components...
  • Page 48 Steps 1. Flip the system board over and connect the I/O daughter board data cable. 2. Align and place the system board on the palmrest and keyboard assembly. 3. Replace the five (M1.6x3.5) screws to secure the system board to the palmrest and keyboard assembly . 4.

  • Page 49: Display Assembly

    6. Install the base cover. 7. Install the SIM card tray. 8. Install the microSD card. 9. Follow the procedure in After working on your computer. Display assembly Removing the display assembly Prerequisites 1. Follow the procedure in before working inside your computer.
  • Page 50 Removing and installing components...
  • Page 51 Steps 1. Remove the single (M1.6x3.5) screw that secures the display-cable bracket, and remove the display-cable bracket. 2. Using the pull tab, disconnect the display cable from the system board and peel back the camera cable from the system board. NOTE: Users must disconnect the display cable from the system board by pulling the pull tab in a direct upward motion to prevent damage to the connector's pins.

  • Page 52: Installing The Display Assembly

    CAUTION: This latch is fragile and requires care when flipping it up to unlock the camera cable. 3. Open the display assembly to 90 degrees and then place the system on the edge of a flat surface so that the display assembly can extend below the edge of the surface.
  • Page 53 Removing and installing components...

  • Page 54: Keyboard

    Steps 1. Align and place the system chassis under the hinges of the display assembly. 2. Install the six (M2.5x5) screws that secure the display hinges to the laptop. 3. Connect the display cable to the system board. Connect and adhere the camera cable to the system board. 4.
  • Page 55 3. Remove the SIM card tray. 4. Remove the base cover. 5. Remove the solid-state drive. 6. Remove the WWAN card. 7. Remove the speakers. 8. Remove the battery. 9. Remove the display assembly. 10. Remove the system fan. 11. Remove the I/O daughter board.
  • Page 56 Steps 1. Peel and remove the mylar adhesive sheet from the keyboard. 2. Disconnect the backlight cable and the keyboard cable from the connectors on the touchpad. 3. Peel and remove the touchpad FFC from the keyboard assembly. Removing and installing components...

  • Page 57: Installing The Keyboard

    4. Remove the four (M1.6x2) and thirty-six (M1.6x1.5) screws that secures the keyboard to the palmrest. 5. Lift the keyboard from the palmrest. Installing the keyboard 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 keyboard and provides a visual representation of the installation procedure.
  • Page 58 Steps 1. Align and place the keyboard on the palmrest. 2. Install the four (M1.6x2) and thirty-six (M1.6x1.5) screws to secure the keyboard. 3. Adhere the touchpad FFC to the keyboard. Removing and installing components...

  • Page 59: Palmrest Assembly

    4. Connect the keyboard cable and backlight cable to the connectors on the touchpad. 5. Install the mylar adhesive sheet over the keyboard. Next steps 1. Install the system board. 2. Install the I/O daughter board. 3. Install the system fan.
  • Page 60 Steps After performing the preceding steps, you are left with the palmrest assembly. Next steps 1. Install the keyboard. 2. Install the system board. 3. Install the power button. 4. Install the I/O daughter board 5. Install the system fan. 6.

  • Page 61: 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 SLN128938. Drivers and downloads...

  • Page 62: Chapter 4: System Setup

    Boot menu Press <F12> when the Dell logo appears to initiate a one-time boot menu with a list of the valid boot devices for the system. Diagnostics and BIOS Setup options are also included in this menu. The devices that are listed on the boot menu depend on the bootable devices in the system.

  • Page 63: Navigation Keys

    Boot sequence enables you to bypass the System Setup–defined boot device order and boot directly to a specific device (for example: optical drive or hard drive). During the Power-on Self-Test (POST), when the Dell logo appears, you can: ● Access System Setup by pressing F2 key ●...
  • Page 64 ● Ownership Tag ● Signed Firmware Update - This helps to verify that only Dell Signed and released BIOS can be installed on the computer. Battery The Battery field provides battery and adapter related information: ●...

  • Page 65: Boot Configuration

    Table 4. BIOS Overview Page (continued) Options Description ● Memory Speed - This field mentions the speed at which the memory runs on the computer. ● Memory Channel Mode - This field helps us identify if the computer has Dual-Channel memory utilization capability. ●...

  • Page 66: Integrated Devices

    Table 5. Boot Configuration: Options Description Enable Secure Boot This section contains a toggle switch that allows the user to enable or disable Secure Boot. (OFF by default) Secure Boot Mode This section allows the user to select one of the two Secure Boot options available on the computer: ●...

  • Page 67: Storage

    (Disabled by default). Type-C Dock Override This section contains a toggle switch to enable or disable the option to use connected Type-C Dell Dock when keeping external USB ports disabled(Disabled by default). Video This section contains a toggle switch to enable or disable using Video on Dell external ports (Disabled by default).

  • Page 68: Display

    Table 7. Storage Options Description SATA Operation This section allows the user to select the operating mode of the integrated SATA hard drive controller. The following options are available: ● Disabled - SATA controllers are disabled. ● AHCI - SATA is configured in AHCI mode. ●...

  • Page 69: Connection

    Table 8. Display Options Description Full Screen Logo This section contains a toggle switch which allows the user to enable/disable the option to view a full screen logo (disabled by default). Connection This section provides connection details and settings. Table 9. Connection Options Description Wireless Device Enable...
  • Page 70 This section contains a toggle switch to allow the user to enable or disable the option to wake on USB-C Dock. This feature allows the system to use a Dell USB-C Dock to wake the system from standby mode (ON by default).

  • Page 71: Security

    Table 10. Power (continued) Options Description Block Sleep Block Sleep This section contains a toggle switch to allow the user to enable or disable the system from entering Sleep(S3) mode in the operating system (OFF by default). NOTE: When enabled, it will not allow the system to go to sleep, IRST is disabled and power options in the operating system will be blank.
  • Page 72 Table 11. Security (continued) Options Description will allow the OS to skip BIOS PPI user prompts when issuing the clear command (OFF by default). TPM State This section allows the user to enable or disable the TPM. This is the default operating state for the TPM when you want to use its complete arrays of capabilities (enabled by default).

  • Page 73: Passwords

    Table 11. Security Options Description SafeShutter SafeShutter This section allows the user to choose between dynamic and manual shutter control: ● Dynamic Shutter - Camera shutter will automatically open when user grants application permission and close when permission ends. Can be disabled by using the F9 camera mute key(LED on).

  • Page 74: Update Recovery

    OS recovery if the main operating system fails to boot with a set number of failures (ON by default). Dell Auto OS Recovery Threshold Dell Auto OS Recovery Threshold This field allows the user to select the number of failed boot attempts by the system before SupportAssist OS Recovery is triggered.

  • Page 75: System Management

    System Management This section provides System Management settings. Table 14. System Management Options Description Service Tag Service Tag This field provides the unique Service Tag of the computer. Asset Tag Asset Tag This field provides the asset tag which is a unique and up to 64-character identification that can be set by the IT administrator.

  • Page 76: Keyboard

    Keyboard This section provides keyboard settings. Table 15. Keyboard Options Description Fn Lock Options Fn Lock Options This field contains a toggle switch to change the mode of the function keys (ON by default). The options are as follows: ● Lock Mode Standard - Traditional F1-F12 functions ●...

  • Page 77: Pre-Boot Behavior

    Pre-boot Behavior This section provides Pre-boot Behavior details and settings. Table 16. Pre-boot Behavior Options Description Adapter Warnings Enable Adapter Warnings This field contains a toggle switch to enable or disable warning messages during boot when adapters with low power capacity are detected (enabled by default).

  • Page 78: Virtualization

    Virtualization This section provides details on Virtualization settings. Table 17. Virtualization Options Description Intel Virtualization Technology Enable Intel Virtualization Technology(VT) This field contains a toggle switch to enable or disable Virtualization to run Virtual machine monitor(VMM) (enabled by default). VT for Direct I/O Enable Intel VT for Direct I/O This field allows the user to enable or disable the system from being able to perform VT for Direct I/O (enabled by default).

  • Page 79: System Logs

    Table 18. Performance Options Description Intel Turbo Boost Technology Enable Intel Turbo Boost Technology This field allows the user to enable or disable Intel Turbo Boost Technology (enabled by default). ● Disabled - Does not allow the Intel Turbo Boost Technology driver to increase the performance state of the processor above the standard performance.

  • Page 80: Updating Bios On Systems With Bitlocker Enabled

    3. Insert the USB flash drive into the system that requires the BIOS update. 4. Restart the system and press F12 when the Dell splash logo appears to display the One Time Boot Menu. 5. Using arrow keys, select USB Storage Device and click Enter.

  • Page 81: System And Setup Password

    Figure 1. DOS BIOS Update Screen System and setup password Table 20. System and setup password Password type Description System password Password that you must enter to log on to your system. Setup password Password that you must enter to access and make changes to the BIOS settings of your computer.

  • Page 82: Deleting Or Changing An Existing System Setup Password

    ● A password can have up to 32 characters. ● The password can contain the numbers 0 through 9. ● Only lower case letters are valid, upper case letters are not allowed. ● Only the following special characters are allowed: space, (”), (+), (,), (-), (.), (/), (;), ([), (\), (]), (`). 3.

  • Page 83: Chapter 5: Troubleshooting

    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 84: Diagnostics

    Diagnostics Instead of beep codes, errors are indicated by the bicolor Battery Charge/Status LED. A specific blink pattern is followed by flashing a pattern of flashes in amber, followed by white. The diagnostic pattern consists of a two-digit number being represented by a first group of LED blinks (1 through 9) in amber, followed by a 1.5 second pause with the LED off, and then a second group of LED blinks (1 through 9) in white.

  • Page 85: Diagnostic Error Messages

    CACHE DISABLED DUE TO FAILURE The primary cache internal to the microprocessor has failed. Contact Dell CD DRIVE CONTROLLER FAILURE The optical drive does not respond to commands from the computer.
  • Page 86 Then, shut down the computer, reinstall the hard drive, and restart the computer. If the problem persists, try another drive. Run the Hard Disk Drive tests in Dell Diagnostics. INSERT BOOTABLE MEDIA The operating system is trying to boot to non-bootable media, such as an optical drive.
  • Page 87 The operating system cannot find a specific track on the hard drive. SHUTDOWN FAILURE A chip on the system board may be malfunctioning. Run the System Set tests in Dell Diagnostics. If the message reappears, Contact Dell. TIME-OF-DAY CLOCK LOST POWER System configuration settings are corrupted. Connect your computer to an electrical outlet to charge the battery.

  • Page 88: System Error Messages

    UNEXPECTED INTERRUPT IN PROTECTED MODE The keyboard controller may be malfunctioning, or a memory module may be loose. Run the System Memory tests and the Keyboard Controller test in Dell Diagnostics or Contact Dell. X:\ IS NOT ACCESSIBLE. THE DEVICE IS NOT Insert a disk into the drive and try again.

  • Page 89: Wi-Fi Power Cycle

    Wi-Fi power cycle About this task If your computer is unable to access the internet due to Wi-Fi connectivity issues, a Wi-Fi power cycle procedure must be performed. The following procedure provides the instructions on how to conduct a WiFi power cycle: NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device.

  • Page 90: Chapter 6: Getting Help

    About this task Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be available in your area. To contact Dell for sales, technical support, or customer service issues: Steps 1.

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