1. Manuals
  2. Brands
  3. Dell Manuals
  4. Desktop
  5. W26C
  6. Service manual

Dell W26C Service Manual

Hide thumbs Also See for W26C:
Table of Contents

Advertisement

Quick Links

Download this manual
OptiPlex 7400
Service Manual
Regulatory Model: W26C
Regulatory Type: W26C005/W26C006
March 2022
Rev. A00
Questo manuale d'istruzione è fornito da trovaprezzi.it. Scopri tutte le offerte per
i5-12500 / 8GB / 256GB / Windows 10 Pro
e Workstation
o cerca il tuo prodotto tra le
migliori offerte di PC Desktop
Dell OptiPlex 7400

Advertisement

Table of Contents
loading

Related Manuals for Dell W26C

Summary of Contents for Dell W26C

  • Page 1 Dell OptiPlex 7400 i5-12500 / 8GB / 256GB / Windows 10 Pro o cerca il tuo prodotto tra le migliori offerte di PC Desktop e Workstation OptiPlex 7400 Service Manual Regulatory Model: W26C Regulatory Type: W26C005/W26C006 March 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..................6 Safety instructions................................6 Before working inside your computer........................6 Safety precautions.................................7 Electrostatic discharge—ESD protection........................7 ESD field service kit ..............................8 Transporting sensitive components.......................... 9 After working inside your computer..........................9 BitLocker..................................9 Chapter 2: Removing and installing components................10 Recommended tools................................10 Screw list.....................................
  • Page 4 Removing the coin-cell battery..........................36 Installing the coin-cell battery..........................37 Wireless card..................................38 Removing the wireless card............................38 Installing the wireless card............................39 Camera assembly................................41 Removing the camera assembly..........................41 Installing the camera assembly..........................42 Bottom cover..................................43 Removing the bottom cover............................. 43 Installing the bottom cover............................
  • Page 5 Running the SupportAssist Pre-Boot System Performance Check..............97 Display built-in self test..............................97 Power-Supply Unit Built-in Self-Test ..........................98 System-diagnostic lights..............................98 Recovering the operating system..........................99 Real Time Clock—RTC reset............................100 Backup media and recovery options........................... 100 WiFi power cycle................................100 Chapter 6: Getting help and contacting Dell................101 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

    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 8: Esd Field Service Kit

    Always place parts in your hand, on the ESD mat, in the system, or inside an anti-static bag. ● 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. Working inside your computer...

  • Page 9: Transporting Sensitive Components

    It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all insulator parts while performing service and that they use anti-static bags for transporting sensitive components.

  • Page 10: Chapter 2: Removing And Installing Components

    Removing and installing components NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Recommended tools The procedures in this document may require the following tools: ● Phillips screwdriver #1 ● Plastic scribe Screw list NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and...
  • Page 11 Table 1. Screw list (continued) Component Screw type Quantity Screw image M3x5 Camera assembly M3x5 Camera door Captive screws Heat sink—UMA Captive screws Heat sink—Discrete M3x5 Power-supply unit (PSU) M3x5 PSU fan M3x5 Rear-I/O bracket M3x5 System board M3 4+7.1xZN Speakers M3x5 Power-button board...

  • Page 12: Major Components Of Optiplex 7400 All-In-One

    21. PSU fan 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: Stand

    Before working inside your computer. CAUTION: When servicing the system, place it on an elevated, clean, and flat surface. Dell Technologies recommends removing the stand to avoid accidental damage to the system display during servicing. About this task The following image provides a visual representation of the fixed stand removal procedure.

  • Page 14: Removing The Height Adjustable Stand

    Before working inside your computer. CAUTION: When servicing the system, place it on an elevated, clean, and flat surface. Dell recommends removing the stand to avoid accidental damage to the system display during servicing. About this task The following image provides a visual representation of the height adjustable stand removal procedure.

  • Page 15: Installing The Height Adjustable Stand

    Steps 1. Press and slide the release button up. 2. Hold the button in the release position, and lift the stand upward. 3. Slide the stand downward, to lift the stand off the back cover. Installing the height adjustable stand Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 16: Cable Cover-Optional

    Steps 1. Align the tabs on the stand with the slots on the back cover. 2. Slide the stand upward until it clicks into place. Next steps 1. Follow the procedure in After working inside your computer. Cable cover—optional Removing the cable cover Prerequisites 1.
  • Page 17 Steps 1. Unroute the power cable from the slots on the cable cover. 2. Remove the screw (M3x9) that secures the cable cover to the bottom cover. 3. Lift the cable cover from the bottom cover. Removing and installing components...

  • Page 18: Installing The Cable Cover

    Installing the cable cover Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image provides a visual representation of the cable cover installation procedure: Removing and installing components...

  • Page 19: Back Cover

    Steps 1. Route the power cable through the slots on the cable cover. 2. Align the screw hole on the cable cover with the screw hole on the bottom cover. 3. Replace the screw (M3x9) to secure the cable cover to the bottom cover. Next steps 1.
  • Page 20 Steps 1. Press and hold the release tab on the back cover to release it from the latch on the system-board shield. 2. Slide the back cover up to release the tabs on the cover from the slots on the middle frame. 3.

  • Page 21: Installing The Back Cover

    Installing the back cover Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image provides a visual representation of the back cover installation procedure. Removing and installing components...

  • Page 22: Memory Modules

    Steps 1. Place the back cover on the middle frame and system-board shield and align the tabs on the back cover with the slots on the middle frame. 2. Slide the back cover to lock the release tab under the latch on the system-board shield. Next steps 1.

  • Page 23: Installing The Memory Modules

    Steps 1. Pry and remove the DIMM door from the system-board shield. 2. Using your fingertips, spread apart the securing clips on the memory-module slot until the memory module pops up. 3. Slide and remove the memory module from the memory-module slot. NOTE: Repeat step 2 and 3 if there are two memory modules.

  • Page 24: System-Board Shield

    Steps 1. Align the notch on the memory module with the tab on the memory-module slot. 2. Slide the memory module firmly into the slot at an angle and press the memory module down until it clicks into place. NOTE: If you do not hear the click, remove the memory module and reinstall it.

  • Page 25: Installing The System-Board Shield

    2. Remove the stand. 3. Remove the cable cover (optional). 4. Remove the back cover. About this task The following image indicates the location of the system-board shield and provides a visual representation of the removal procedure. Steps 1. Remove the five screws (M3x5) that secure the system-board shield to the display-assembly base. 2.

  • Page 26: Solid-State Drive

    Steps 1. Align the screw holes on the system-board shield with the screw holes on the display-assembly base. 2. Replace the five screws (M3x5) to secure the system-board shield to the display-assembly base. Next steps 1. Install the back cover. 2.

  • Page 27: Installing The M.2 2230 Solid-State Drive-Slot 1

    About this task The following image indicates the location of the slot-1 M.2 2230 solid-state drive and provides a visual representation of the removal procedure. Steps 1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board. 2.

  • Page 28: Removing The M.2 2280 Solid-State Drive-Slot 1

    Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x2.5) to secure the solid-state drive to the system board. Next steps 1.

  • Page 29: Installing The M.2 2280 Solid-State Drive-Slot 1

    Steps 1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board. 2. Slide and remove the solid-state drive from the M.2 card slot on the system board. Installing the M.2 2280 solid-state drive-slot 1 Prerequisites CAUTION: Solid-state drives are fragile.

  • Page 30: Removing The M.2 2230 Solid-State Drive-Slot 2

    Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x2.5) to secure the solid-state drive to the system board. Next steps 1.

  • Page 31: Installing The M.2 2230 Solid-State Drive-Slot 2

    Steps 1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board. 2. Slide and remove the solid-state drive from the M.2 card slot on the system board. Installing the M.2 2230 solid-state drive-slot 2 Prerequisites CAUTION: Solid-state drives are fragile.

  • Page 32: Removing The M.2 2280 Solid-State Drive-Slot 2

    Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x2.5) to secure the solid-state drive to the system board. Next steps 1.

  • Page 33: Installing The M.2 2280 Solid-State Drive-Slot 2

    Steps 1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board. 2. Slide and remove the solid-state drive from the M.2 card slot on the system board. Installing the M.2 2280 solid-state drive-slot 2 Prerequisites CAUTION: Solid-state drives are fragile.

  • Page 34: System Fan

    Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x2.5) to secure the solid-state drive to the system board. Next steps 1.

  • Page 35: Installing The System Fan

    Steps 1. Disconnect the system-fan cable from the system board. 2. Remove the three screws (M3x5) that secure the system fan to the display-assembly base. 3. Lift the system fan, along with its cable, off the display-assembly base. Installing the system fan Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 36: Coin-Cell Battery

    Steps 1. Align the screw holes on the system fan with the screw holes on the display-assembly base. 2. Replace the three screws (M3x5) to secure the system fan to the display-assembly base. 3. Connect the system-fan cable to the connector on the system board. Next steps 1.

  • Page 37: Installing The Coin-Cell Battery

    Steps 1. Using the plastic scribe, press on the metal clip to release the coin-cell battery from the coin-cell battery holder. 2. Lift the coin-cell battery from the coin-cell battery holder. Installing the coin-cell battery 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 coin-cell battery and provides a visual representation of the installation procedure.

  • Page 38: Wireless Card

    Steps With the positive-side facing up, insert the coin-cell battery into the battery holder on the system board and gently press the battery until it snaps into place. Next steps 1. Install the system-board shield. 2. Install the back cover. 3.

  • Page 39: Installing The Wireless Card

    Steps 1. Remove the two screws (M2x2.5) that secure the wireless-card shield to the system board. 2. Unroute the antenna cables from the routing guides on the wireless-card shield. 3. Lift the wireless-card shield out of the system. 4. Remove the screw (M2x2.5) that secures the wireless-card bracket to the wireless card. 5.
  • Page 40 Steps 1. Connect the antenna cables to the wireless card. The following table provides the antenna-cable color scheme: Table 2. Antenna-cable color scheme Connectors on the Antenna-cable color Silkscreen marking wireless card △ (white triangle) Main White MAIN Auxiliary Black ▲...

  • Page 41: Camera Assembly

    3. Install the cable cover (optional). 4. Install the stand. 5. Follow the procedure in After working inside your computer. Camera assembly Removing the camera assembly Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3.

  • Page 42: Installing The Camera Assembly

    Steps 1. Remove the two screws (M3x5) that secure the camera-assembly door to the display-assembly base. 2. Disconnect the camera cable from the connector on the system board. 3. Remove the two screws (M3x5) that secure the camera assembly to the middle frame. 4.

  • Page 43: Bottom Cover

    2. Slide the camera assembly on the middle frame, and align the screw holes on the camera assembly with the screw holes on the middle frame. 3. Replace the two screws (M3x5) to secure the camera assembly to the middle frame. 4.

  • Page 44: Installing The Bottom Cover

    Steps 1. Remove the four screws (M3x5) that secure the bottom cover to the display-assembly base. 2. Pry and lift the bottom cover off the display-assembly base. Installing the bottom cover 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 bottom cover and provides a visual representation of the installation procedure.

  • Page 45: Power-Supply Unit

    Steps 1. Align the screw holes on the bottom cover with the screw holes on the display-assembly base. 2. Replace the four screws (M3x5) to secure the bottom cover to the display-assembly base. Next steps 1. Install the system-board shield. 2.
  • Page 46 Steps 1. Remove the screw (M3x5) that secures the power-supply socket to the rear-I/O bracket. 2. Slide the power-supply socket out of the rear-I/O bracket. 3. Remove the power-supply cable from the routing guides on the rear-I/O bracket and PSU fan. 4.

  • Page 47: Installing The Power-Supply Unit (Psu)

    Installing the power-supply unit (PSU) 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 PSU and provides a visual representation of the PSU installation procedure. Removing and installing components...

  • Page 48: Power-Supply Fan

    Steps 1. Align and place the PSU in the slot on the display-assembly base. 2. Replace the screw (M3x5) to secure the PSU to the display-assembly base. 3. Connect the power-supply cable to the connector on the system board. 4. Route the power-supply cable through the routing guides on the rear-I/O bracket and PSU fan. 5.

  • Page 49: Installing The Psu Fan

    Steps 1. Remove the power-supply cable from the routing guides on the PSU fan. 2. Disconnect the PSU-fan cable from the system board. 3. Remove the two screws (M3x5) that secure the PSU fan to the display-assembly base. 4. Lift the PSU fan from the display-assembly base. Installing the PSU fan Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 50: Heat Sink

    Steps 1. Align the screw holes on the PSU fan with the screw holes on the display-assembly base. 2. Replace the two screws (M3x5) to secure the PSU fan to the display-assembly base. 3. Connect the PSU-fan cable to the connector on the system board. 4.

  • Page 51: Installing The Heat Sink-Uma

    Steps 1. In reverse sequential order (as indicated on the heat sink), loosen the five captive screws that secure the heat sink to the system board and the display-assembly base. 2. Slide and lift the heat sink off the system board and display-assembly base. Installing the heat sink—UMA Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 52: Removing The Heat Sink-Discrete

    Steps 1. Align the screw holes on the heat sink with the screw holes on the system board and the display-assembly base. 2. In sequential order (as indicated on the heat sink), tighten the five captive screws that secure the heat sink to the system board and display-assembly base.

  • Page 53: Installing The Heat Sink-Discrete

    About this task The following image indicates the location of the heat sink and provides a visual representation of the heat sink removal procedure. Steps 1. In reverse sequential order (as indicated on the heat sink), loosen the nine captive screws that secure the heat sink to the system board and the display-assembly base.

  • Page 54: Processor

    Steps 1. Align the screw holes on the heat sink with the screw holes on the system board and the display-assembly base. 2. In sequential order (as indicated on the heat sink), tighten the nine captive screws to secure the heat sink to the system board and display-assembly base.

  • Page 55: Installing The Processor

    6. Remove the heat sink. About this task The following image indicates the location of the processor and provides a visual representation of the removal procedure. Steps 1. Press the release lever down and then push it away from the processor to release it from the securing tab. 2.
  • Page 56 Steps 1. Ensure that the release lever on the processor socket is fully extended in the open position. NOTE: The pin-1 corner of the processor has a triangle that aligns with the triangle on the pin-1 corner on the processor socket.

  • Page 57: Rear-I/O Bracket

    Rear-I/O bracket Removing the rear-I/O bracket Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the cable cover (optional). 4. Remove the back cover. 5. Remove the system-board shield. 6. Remove the bottom cover.

  • Page 58: Installing The Rear-I/O Bracket

    Installing the rear-I/O bracket 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 rear-I/O bracket and provides a visual representation of the installation procedure.

  • Page 59: System Board

    System board Removing the system board Prerequisites 1. Follow the procedure in Before working inside your computer. NOTE: Your computer’s Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup program after you replace the system board. NOTE: Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program.
  • Page 60 2. Coin-cell battery 3. Display back-light cable connector 4. Camera cable connector 5. M.2 2230/2280 solid-state drive PCIe connector 6. Processor-fan cable connector 7. Memory modules 8. M.2 2230/2280 solid-state drive PCIe connector 9. Side I/O-signal cable connector 10. Side I/O-power cable connector 11.

  • Page 61: Installing The System Board

    8. Disconnect the SIO-signal cable from the connector on the system board. 9. Disconnect the SIO-power cable from the connector on the system board. 10. Disconnect the audio-board cable from the connector on the system board. 11. Disconnect the system fan cable from the connector on the system board. 12.
  • Page 62 12. Microphone-module cable connector 13. Speaker cable connector 14. Display cable connector 15. M.2 WLAN connector 16. PSU-fan cable connector 17. Touchscreen cable connector 18. Processor The following image indicates the location of the system board and provides a visual representation of the installation procedure. Steps 1.

  • Page 63: Speakers

    NOTE: Ensure the display back-light cable is routed under the system board and not to the side of the system board to avoid the cable getting caught between the system board and the camera. This damages the cable, and the camera may not lock in a closed position.

  • Page 64: Installing The Speakers

    Steps 1. Disconnect the speaker cable from the connector on the system board. 2. Remove the six screws (M3 4+7.1xZN) that secure the speakers to the display-assembly base. 3. Remove the speaker cable from the routing guides on the display-assembly base. 4.

  • Page 65: Power-Button Board

    Steps 1. Align the screw holes on the speakers with the screw holes on the display-assembly base. 2. Replace the six screws (M3 4+7.1xZN) to secure the speakers to the display-assembly base. 3. Route the speaker cable through the routing guide on display-assembly base and connect the speaker cable to the system board.

  • Page 66: Installing The Power-Button Board

    Steps 1. Open the latch and disconnect the power-button cable from the connector on the system board. 2. Remove the screw (M3x5) that secures the power-button board to the middle frame. 3. Lift the power-button board along with cable off the middle frame. Installing the power-button board Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 67: Microphones

    Steps 1. Align and place the power-button board in the slot on the middle frame. 2. Replace the screw (M3x5) to secure the power-button board to the middle frame. 3. Slide the power-button cable into the connector on the system board and close the latch to secure the cable. Next steps 1.
  • Page 68 6. Remove the bottom cover. 7. Remove the rear-I/O bracket. 8. Remove the speakers. About this task The following image indicates the location of the microphones and provides a visual representation of the removal procedure. Steps 1. Disconnect the microphone cable from the system board, and unroute it from the routing guides on the display-assembly base.

  • Page 69: Installing The Microphones

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

  • Page 70: Side I/O-Board

    Next steps 1. Install the speakers. 2. Install the rear-I/O bracket. 3. Install the bottom cover. 4. Install the system-board shield. 5. Install the back cover. 6. Install the cable cover (optional). 7. Install the stand. 8. Follow the procedure in After working inside your computer.

  • Page 71: Installing The Side I/O-Board

    Steps 1. Remove the two screws (M3x5) that secure the side I/O-board shield to the display-assembly base. 2. Lift and remove the side I/O-board shield off the side I/O-board. 3. Disconnect the SIO-signal cable, SIO-power cable, and audio-board cable from the system board. 4.
  • Page 72 Steps 1. Align the screw holes on the side I/O-board with the screw holes on the display-assembly base. 2. Replace the two screws (M2.5x3.5) to secure the side I/O-board to the display-assembly base. 3. Route the SIO-signal cable, SIO-power cable, and audio-board cable through the routing guides on the display-assembly base.

  • Page 73: Audio Board

    Audio board Removing the audio board Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the cable cover (optional). 4. Remove the back cover. 5. Remove the system-board shield. 6. Remove the bottom cover.

  • Page 74: Antenna Modules

    Steps 1. Align the screw hole on the audio board with the screw hole on the display-assembly base. 2. Replace the screw (M3x5) to secure the audio board to the display-assembly base. 3. Connect the audio-board cable to the system board. Next steps 1.

  • Page 75: Installing The Antenna Modules

    Steps 1. Remove the antenna cables from the routing guides on the display-assembly base. 2. Remove the two screws (M2x2.5) that secure the antenna modules to the middle frame. 3. Carefully peel the copper foil that secures the antenna cables to the middle frame. 4.

  • Page 76: Display Panel

    Steps 1. Align and place the antenna modules in the slots on the middle frame. 2. Adhere the copper foil that secures the antenna cables to the middle frame. 3. Replace the two screws (M2x2.5) to secure the antenna modules to the middle frame. 4.
  • Page 77 9. Remove the camera assembly. 10. Remove the system board. 11. Remove the fan. 12. Remove the PSU. About this task The following image indicates the location of the display panel and provides a visual representation of the display panel removal procedure.

  • Page 78: Installing The Display Panel

    Steps 1. Remove the 11 screws (M3x5) (for touch display) and 12 screws (M3x5) (for non-touch display) that secure the display panel to the middle frame and display-assembly base. 2. Unroute the display back-light cable from the routing guides on the display-assembly base. 3.
  • Page 79 Steps 1. Place the system in an upright position, and slide the display panel on the slots of the display-assembly base. 2. Route the display-backlight, and display cable through the slots on the display-assembly base. Removing and installing components...

  • Page 80: Middle Frame

    3. Place the display-assembly base on a clean and flat surface with the display panel facing down. 4. Replace the nine screws (M3x5) (for touch display) and ten screws (M3x5) (for non-touch display) to secure the display panel to the middle frame and display-assembly base. 5.

  • Page 81: Installing The Middle Frame

    Steps 1. Remove the 17 screws (M3x5) that secure the middle frame to the display-assembly base. 2. Remove the middle frame and lift the middle frame off the display-assembly base. Installing the middle frame 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 middle frame and provides a visual representation of the middle frame installation procedure.
  • Page 82 Steps 1. Slide and align the middle frame to the slots on the display-assembly base, then snap the middle frame into place on the display-assembly base. 2. Replace the 17 screws (M3x5) to secure the middle frame to the display-assembly base. Next steps 1.

  • Page 83: 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 84: 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 85: System Setup Options

    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 86 Table 4. System setup options—System information menu (continued) Overview DIMM_SLOT 1 Displays the DIMM 1 memory size. DIMM_SLOT 2 Displays the DIMM 2 memory size. Devices Information Panel Type Displays the Panel Type of the computer. Video Controller Displays the video controller type of the computer. Video Memory Displays the video memory information of the computer.
  • Page 87 Table 6. System setup options—Integrated Devices menu (continued) Integrated Devices Audio Enable Audio Enable or disable the integrated audio controller. By default, all the options are enabled. USB Configuration ● Enable or disable booting from USB mass storage devices through the boot sequence or boot menu.
  • Page 88 Table 8. System setup options—Display menu Display OSD Button Management Disable OSD Buttons Enable or disable the OSD (On-Screen Display) buttons on the computer. Full Screen Logo Enable or disable full screen logo. By default, the option is not enabled. Table 9.
  • Page 89 Table 10. System setup options—Power menu (continued) Power By default, the Enabled in S4 and S5 option is enabled. Fan Control Override Enable or disable the fan control override feature. By default, the option is disabled. Intel Speed Shift Technology Enable or disable the Intel speed shift technology support.
  • Page 90 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 91 By default, the option is enabled. Dell Auto OS Recovery Threshold Controls the automatic boot flow for SupportAssist System Resolution Console and for Dell OS Recovery Tool. By default, the threshold value is set to 2. Table 14. System setup options—System Management menu...
  • Page 92 Table 15. System setup options—Keyboard menu Keyboard Keyboard Errors Enable Keyboard Error Detection Enable or disable the keyboard error detection. By default, the option is enabled. Numlock LED Enable Numlock LED Enable or disable Numlock LED. By default, the option is enabled. Table 16.

  • Page 93: Updating The Bios

    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. You can also use the product ID or manually browse for your computer model.

  • Page 94: Updating The Bios Using The Usb Drive In Windows

    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 95: System And Setup Password

    Steps 1. From a turn off state, insert the USB drive where you copied the flash into a USB port of the computer. 2. Turn on the computer and press F12 to access the One-Time Boot Menu, select BIOS Update using the mouse or arrow keys then press Enter.

  • Page 96: 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 97: 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 98: Power-Supply Unit Built-In Self-Test

    (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 99: 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 100: Real Time Clock-Rtc Reset

    Real Time Clock—RTC reset The Real Time Clock (RTC) reset function allows you or the service technician to recover the recently launched model Dell Latitude and Precision systems from No POST/No Boot/No Power situations. You can initiate the RTC reset on the system from a power-off state only if it is connected to AC power.

  • Page 101: 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...

This manual is also suitable for:

Optiplex 7400

Table of Contents