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Dell OptiPlex 3090 Service Manual
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Dell OptiPlex 3090 Service Manual

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OptiPlex 3090 Tower
Service Manual
Regulatory Model: D29M
Regulatory Type: D29M001
October 2021
Rev. A00

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Summary of Contents for Dell OptiPlex 3090

  • Page 1 OptiPlex 3090 Tower Service Manual Regulatory Model: D29M Regulatory Type: D29M001 October 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 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 Chapter 2: Removing and installing components................10 Recommended tools................................10 Screw list.....................................
  • Page 4 Removing the graphics card............................. 34 Installing the graphics card............................34 Graphical processing unit..............................35 Removing the powered GPU............................ 35 Installing the powered GPU............................36 Coin-cell battery................................38 Removing the coin-cell battery..........................38 Installing the coin-cell battery..........................38 WLAN card..................................39 Removing the WLAN card............................39 Installing the WLAN card............................
  • Page 5 Dell SupportAssist Pre-boot System Performance Check diagnostics..............82 Running the SupportAssist Pre-Boot System Performance Check..............82 Diagnostic LED behavior..............................82 Recovering the operating system..........................84 Real-Time Clock (RTC Reset)............................84 Backup media and recovery options..........................84 WiFi power cycle................................84 Chapter 6: Getting help and contacting Dell................86 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 #0 ● Phillips screwdriver #1 ●...

  • Page 11: Side Cover

    Table 1. Screw list (continued) Component Screw type Quantity Image 3.5 in. hard-drive #6-32 System board #6-32 Side cover Removing the side cover Prerequisites 1. Follow the procedure in before working inside your computer. NOTE: Ensure that you remove the security cable from the security-cable slot (if applicable). About this task The following images indicate the location of the side cover and provide a visual representation of the removal procedure.

  • Page 12: Installing The Side Cover

    Steps 1. Loosen the thumbscrew (#6-32) that secures the side cover to the computer. 2. Slide the side cover towards the rear of the computer and lift the cover away from the computer. Installing the side 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 side cover and provides a visual representation of the installation procedure.
  • Page 13 Steps 1. Locate the side cover slot on your computer. 2. Align the tabs on the side cover with the slots on the chassis. 3. Slide the side cover towards the front of the computer to install it. 4. Tighten the thumbscrew (#6-32) to secure the side cover to the computer. Next steps 1.

  • Page 14: Front Bezel

    Front bezel Removing the front bezel Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover. About this task The following images indicate the location of the front bezel and provide a visual representation of the removal procedure. Steps 1.

  • Page 15: Fan Shroud

    About this task The following image indicates the location of the front bezel and provides a visual representation of the installation procedure. Steps 1. Position the front bezel to align the tabs on the bezel with the slots on the chassis. 2.

  • Page 16: Installing The Fan Duct

    Steps 1. Press the retention tabs on both sides of the fan duct to release it. 2. Pull and remove the fan duct from the computer. Installing the fan duct 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 fan duct and provides a visual representation of the installation procedure.

  • Page 17: 2.5-Inch Hard-Drive Assembly

    Steps 1. Position the fan duct to align it with the slots on the computer chassis. 2. Press the fan duct until it clicks into place. Next steps 1. Install the side cover. 2. Follow the procedure in after working inside your computer.

  • Page 18: Removing The 2.5-Inch Hard-Drive Bracket

    Steps 1. Disconnect the hard-drive data and power cables from the connectors on the 2.5-inch hard-disk drive module. 2. Press the release tabs on both the sides of the hard-drive bracket to release it from the slots on the computer chassis. 3.

  • Page 19: Installing The 2.5-Inch Hard-Drive Bracket

    About this task The following images indicate the location of the 2.5-inch hard-drive bracket and provides a visual representation of the removal procedure. Steps 1. Remove the two (M3x3.5) screws that secure the first hard drive to the hard-drive metal bracket. 2.

  • Page 20: Installing The 2.5-Inch Hard-Drive Assembly

    Steps 1. Place the first hard-drive into the hard-drive metal bracket and align the slots on the bracket with the slots on the hard drive. 2. Replace the two (M3x3.5) screws to secure the first hard drive to the hard-drive metal bracket. 3.
  • Page 21 About this task The following image indicates the location of the 2.5-inch hard-drive assembly and provides a visual representation of the installation procedure. Steps 1. Align the hard-drive assembly at an angle to the slot on the computer. 2. Press the release tabs on the hard-drive bracket and slightly align back to insert the hard-drive assembly to the slot on the computer chassis.

  • Page 22: 3.5-Inch Hard Drive

    3.5-inch hard drive Removing the 3.5-inch hard drive Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover. 3. Remove the duct. About this task The following images indicate the location of the 3.5-inch hard-disk drive and provides a visual representation of the removal procedure.

  • Page 23: Solid-State Drive

    Steps 1. Hold the 3.5-inch hard drive against the chassis and align the four (#6-32) grommet screws on the hard drive with the screw holes on the chassis. 2. Slide the 3.5-inch hard drive down to lock the four grommet screws on to its screw holes on the chassis. 3.

  • Page 24: Installing The M.2 2230 Pcie Solid-State Drive

    Steps 1. Remove the screw (M2x3.5) that secures the solid-state drive to the system board. 2. Slide and lift the solid-state drive off the system board. Installing the M.2 2230 PCIe solid-state drive 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 solid-state drive and provides a visual representation of the installation procedure.

  • Page 25: Removing The M.2 2280 Pcie Solid-State Drive

    Steps 1. Align the notch on the solid-state drive with the tab on the solid-state drive connector. 2. Insert the solid-state drive at a 45-degree angle into the slot on the system board. 3. Replace the screw (M2x3.5) to secure the M.2 2230 solid-state drive to the system board. Next steps 1.

  • Page 26: Installing The M.2 2280 Pcie Solid-State Drive

    Steps 1. Remove the screw (M2x3.5) that secures the solid-state drive to the system board. 2. Slide and lift the solid-state drive off the system board. Installing the M.2 2280 PCIe solid-state drive 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 solid-state drive and provides a visual representation of the installation procedure.

  • Page 27: Memory Modules

    Steps 1. Align the notch on the solid-state drive with the tab on the solid-state drive connector. 2. Insert the solid-state drive at a 45-degree angle into the slot on the system board. 3. Replace the screw (M2x3.5) to secure the M.2 2280 solid-state drive to the system board. Next steps 1.

  • Page 28: Installing The Memory Modules

    Steps 1. Pull the securing clips from both side of the memory module until the memory module pops up. 2. Slide and remove the memory module from the memory-module slot. Installing the memory modules 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 memory modules and provides a visual representation of the installation procedure.

  • Page 29: Processor Fan And Heat-Sink Assembly

    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 30: Installing The Processor Fan And Heat-Sink Assembly

    About this task The following images indicate the location of the processor fan and heat-sink assembly and provide a visual representation of the removal procedure. Steps 1. Disconnect the processor fan cable from the connector on the system board. 2. Loosen the four captive screws that secure the processor fan and heat-sink assembly to the system board. 3.

  • Page 31: Processor

    Steps 1. Align the screw holes on the processor fan and heat-sink assembly with the screw holes on the system board. 2. Tighten the four captive screws that secure the processor fan and heat-sink assembly to the system board. 3. Connect the processor-fan cable to the connector on the system board. Next steps 1.

  • Page 32: Installing The Processor

    About this task The following images indicate the location of the processor and provide a visual representation of the removal procedure. Steps 1. Press down and push the release lever away from the processor to release it from the securing tab. 2.
  • Page 33 Steps 1. Ensure that the release lever on the processor socket is fully extended in the open position. 2. Align the notches on the processor with the tabs on the processor socket and place the processor in the processor socket. 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 34: Graphics Card

    Graphics card Removing the graphics card Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover. 3. Remove the duct. About this task The following images indicate the location of the graphics card and provides a visual representation of the removal procedure. Steps 1.

  • Page 35: Graphical Processing Unit

    Steps 1. Align the graphics card with the PCI-Express card connector on the system board. 2. Using the alignment post, connect the graphics card in the connector and press down firmly. Ensure that the card is firmly seated. 3. Lift the pull tab to close the PCIe door. Next steps 1.

  • Page 36: Installing The Powered Gpu

    2. Remove the side cover. 3. Remove the duct. About this task The following images indicate the location of the powered graphical processing unit and provides a visual representation of the removal procedure. Steps 1. Lift the pull tab to open the PCIe door. 2.
  • Page 37 About this task The following images indicate the location of the powered graphical processing unit and provides a visual representation of the installation procedure. Steps 1. Align the powered GPU with the PCI-Express card connector on the system board. 2. Using the alignment post, connect the powered GPU in the connector and press down firmly. Ensure that the powered GPU is firmly seated.

  • Page 38: 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 side cover. 3. Remove the duct. 4. Remove the powered GPU. NOTE: This step is required only if the system is configured with powered GPU. About this task The following images indicate the location of the coin-cell battery and provide a visual representation of the removal procedure.

  • Page 39: Wlan Card

    Steps 1. Insert the coin cell battery with the "+" sign facing up and slide it under the securing tabs at the positive side of the connector. 2. Press the battery into the connector until it locks into place. Next steps 1.

  • Page 40: Installing The Wlan Card

    Steps 1. Remove the (M2x3.5) screw that secures the WLAN card to the system board. 2. Lift the WLAN card bracket away from the WLAN card. 3. Disconnect the antenna cables from the WLAN card. 4. Slide and remove the WLAN card from the connector on the system board. Installing the WLAN card Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 41 Steps 1. Connect the antenna cables to the WLAN card. The following table provides the antenna-cable color scheme for the WLAN card of your computer. Table 2. Antenna-cable color scheme Connectors on the wireless card Antenna-cable color Main (white triangle) White Auxiliary (black triangle) Black...

  • Page 42: Slim Optical-Drive

    Slim optical-drive Removing the Slim-Optical Disk Drive Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover. 3. Remove the duct. About this task The following images indicate the location of the slim ODD and provides a visual representation of the removal procedure. Steps 1.

  • Page 43: Slim Optical-Drive Bracket

    Steps 1. Insert the slim ODD assembly into the ODD slot. 2. Slide the slim ODD assembly until it snaps into place. 3. Route the power cable and data cable through the routing guides and connect the cables to the slim ODD. Next steps 1.

  • Page 44: Installing The Slim-Odd Bracket

    Steps 1. Pry the slim-ODD bracket to release it from the slot on the ODD. 2. Remove the slim-ODD bracket off the ODD. Installing the slim-ODD bracket 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 slim-ODD bracket and provides a visual representation of the installation procedure.

  • Page 45: Speaker

    4. Follow the procedure in after working inside your computer. Speaker Removing the speaker Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover. 3. Remove the duct. About this task The following images indicate the location of the speakers and provide a visual representation of the removal procedure. Steps 1.

  • Page 46: Power Button

    Steps 1. Press and slide the speaker in the slot on the chassis until it snaps into place. 2. Route the speaker cable through the routing guide on the chassis. 3. Connect the speaker cable to the connector on the system board. Next steps 1.

  • Page 47: Installing The Power Button

    Steps 1. Disconnect the power-button cable from the connector on the system board. 2. Press the release tabs on the power-button head and slide the power-button cable out from the front-side chassis of the computer. 3. Pull the power-button cable out from the computer. Installing the power button Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 48: Power-Supply Unit

    Steps 1. Insert the power-button cable into the slot from the front-side of the computer, and press the power-button head until it clicks into the place in the chassis. 2. Align and connect the power-button cable to the connector on the system board. Next steps 1.
  • Page 49 Removing and installing components...

  • Page 50: Installing The Power-Supply Unit

    Steps 1. Lay the computer on the right side. 2. Disconnect the power cables from the system board and unroute them from the routing guides on the chassis. 3. Remove the three (#6-32) screws that secure the power-supply unit to the chassis. 4.
  • Page 51 Removing and installing components...

  • Page 52: Intrusion Switch

    Steps 1. Slide the power-supply unit into the chassis until the securing tab snaps into position. 2. Replace the three (#6-32) screws to secure the power-supply unit to the chassis. 3. Route the power cable through the routing guides on the chassis and connect the power cables to their respective connectors on the system board.

  • Page 53: Installing The Intrusion Switch

    Steps 1. Disconnect the intruder cable from the connector on the system board. 2. Slide and remove the intrusion switch from the chassis. Installing the intrusion switch 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 intrusion switch and provides a visual representation of the installation procedure.

  • Page 54: Optional I/O Modules (Hdmi/Vga/Dp/Serial)

    Steps 1. Insert the intrusion switch into its slot and slide the switch to secure it into the slot. 2. Connect the intruder cable to the connector on the system board. Next steps 1. Install the duct. 2. Install the side cover.
  • Page 55 Removing and installing components...
  • Page 56 Removing and installing components...

  • Page 57: Installing Optional I/O Modules (Hdmi/Vga/Dp/Serial)

    Steps 1. Remove the two (M3X3) screws that secure the optional I/O module to the computer chassis. 2. Disconnect the I/O-module cable from the connector on the system board. 3. Remove the I/O module from the computer. Installing optional I/O modules (HDMI/VGA/DP/Serial) Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 58 Removing and installing components...
  • Page 59 Removing and installing components...
  • Page 60 Steps 1. To remove the dummy metal bracket, insert a flathead screwdriver in the hole of the bracket, push the bracket to release the bracket, and then lift the bracket out from the system. NOTE: This step is applicable only if upgrading a system that previously had no optional I/O port. 2.

  • Page 61: 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 that you have made to the BIOS using the BIOS setup program.
  • Page 62 Removing and installing components...
  • Page 63 Steps 1. Remove the two (#6-32) screws that secure the front I/O-bracket to the chassis. 2. Slide and remove the front I/O-bracket from the chassis. 3. Disconnect all the cables that are connected to the system board. 4. Remove the M.2 card standoff (#6-32) screw and eight (#6-32) screws that secure the system board to the chassis. Removing and installing components...

  • Page 64: Installing The System Board

    5. Lift the system board at an angle and remove the system board off the chassis. Installing the system 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 system board and provides a visual representation of the installation procedure. Removing and installing components...
  • Page 65 Removing and installing components...
  • Page 66 Steps 1. Slide the front I/O-ports on the system board into the front I/O-slots on the chassis and align the screw holes on the system board with the screw holes on the chassis. 2. Replace the M.2 card standoff (#6-32) screw and eight (#6-32) screws that secure the system board to the chassis. 3.
  • Page 67 4. Align the front I/O-bracket with the slots on the chassis. 5. Replace the two (#6-32) screws to secure the front I/O-bracket to the chassis. Next steps 1. Install the processor. 2. Install the processor fan and heat-sink assembly. 3. Install the coin-cell battery.

  • Page 68: 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 69: 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 70: One Time Boot Menu

    Table 3. Navigation keys (continued) Keys Navigation Moves to the previous page until you view the main screen. Pressing Esc in the main screen displays a message that prompts you to save any unsaved changes and restarts the system. One time boot menu To enter one time boot menu, turn on your computer, and then press F12 immediately.

  • Page 71: System Information

    System information Table 5. System Configuration Option Description Integrated NIC Allows you to control the onboard LAN controller. The option ‘Enable UEFI Network Stack’ is not selected by default. The options are: ● Disabled ● Enabled ● Enabled w/PXE (default) NOTE: Depending on the computer and its installed devices, the items that are listed in this section may or may not appear.

  • Page 72: Security

    Table 6. Video Option Description ● Auto (default) ● Intel HD Graphics NOTE: If you do not select Auto, the on-board graphics device will be present and enabled. Security Table 7. Security Option Description Admin Password Allows you to set, change, and delete the admin password. System Password Allows you to set, change, and delete the system password.

  • Page 73: Secure Boot Options

    Table 7. Security (continued) Option Description ● Permanently Disabled Chassis Intrusion This field controls the chassis intrusion feature. Choose any one of the options: ● Disabled (default) ● Enabled ● On-Silent Admin Setup Lockout Allows you to prevent users from entering Setup when Admin password is set. This option is not set by default.

  • Page 74: Intel Software Guard Extensions Options

    Intel Software Guard Extensions options Table 9. Intel Software Guard Extensions Option Description Intel SGX Enable This field specifies you to provide a secured environment for running code/storing sensitive information in the context of the main OS. Click one of the following options: ●...

  • Page 75: Power Management

    Power management Table 11. Power Management Option Description AC Recovery Determines how the system responds when AC power is re-applied after a power loss. You can set the AC Recovery to: ● Power Off ● Power On ● Last Power State This option is Power Off by default.

  • Page 76: Virtualization Support

    Table 12. POST Behavior (continued) Option Description ● Minimal — The system boots quickly, unless the BIOS has been updated, memory changed, or the previous POST did not complete. ● Thorough — The system does not skip any steps in the boot process. ●...

  • Page 77: Maintenance

    Maintenance Table 15. Maintenance Option Description Service Tag Displays the service tag of your computer. Asset Tag Allows you to create a system asset tag if an asset tag is not already set. This option is not set by default. SERR Messages Controls the SERR message mechanism.

  • Page 78: Supportassist System Resolution

    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 79: Updating The Bios From The F12 One-Time Boot Menu

    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 80: System And Setup Password

    5. Select the file and double-click the flash target file, and then click Submit. 6. Click Update BIOS. The computer restarts to flash the BIOS. 7. The computer will restart after the BIOS update is completed. System and setup password Table 18.

  • Page 81: 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 82: 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 83 Table 19. Diagnostic LED behavior (continued) Blinking pattern Amber White Problem description Suggested resolution CPU failure ● Run the Dell Support Assist/Dell Diagnostics tool. ● If problem persists, replace the system board. System board failure (included ● Flash latest BIOS version BIOS corruption or ROM ●...

  • Page 84: 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 85 5. Turn on the wireless router. 6. Turn on the modem. 7. Turn on your computer. Troubleshooting...

  • Page 86: 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 20. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell app...

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