Skip to main content
Sign Out

Welcome to Dell

My Account
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.
Sign In Create an Account Dell Financial Services Premier Sign In Partner Program Sign In
Contact Us

Your Dell.com Carts

OptiPlex 7090 Tower Service Manual

PDF

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 image indicates the connectors on your system board.

System board layout

  1. CPU power connector
  2. Processor fan connector
  3. Memory module connector
  4. Power button connector
  5. Remote power switch connector
  6. SD card reader connector
  7. SATA0 connector (blue)
  8. M.2 PCIe SSD connector
  9. Internal USB connector
  10. Two SATA1/2 connector (black)
  11. SATA3 connector (white)
  12. SATA power cable connector
  13. Coin-cell battery
  14. M.2 WLAN connector
  15. System power connector
  16. Internal speaker connector
  17. Thunderbolt header
  18. M.2 PCIe SSD connector
  19. PCIe x4 (Slot4)
  20. PCI (Slot3)
  21. PCIe x16 (Slot2)
  22. PCIE x1 (Slot1)
  23. System fan connector
  24. Chassis Intrusion Detection connector
  25. Type-C connector
  26. Processor socket
  27. Video connector

The following images indicate the location of the system board and provide a visual representation of the installation procedure.

Place the system board into the chassis

Installing the system board

Replace the eight screws to secure the system board

Replace the single screw to secure the I/O bracket

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 (M2x4) screw to secure the system board to the chassis.
  3. Replace the eight screws (#6-32) that secure the system board to the chassis.
  4. Route the power cable through the routing guides on the chassis and connect the power cables to their respective connectors on the system board.
  5. Align the front I/O-bracket with the slots on the chassis.
  6. Replace the (#6-32) screw that secures the front I/O-bracket to the chassis.

Next steps

  1. Install the processor.
  2. Install the chassis fan.
  3. Install the processor fan and 125 W heat-sink assembly or processor fan and heat-sink assembly.
  4. Install the coin-cell battery.
  5. Install the VR heatsink.
  6. Remove the intrusion switch.
  7. Remove the speaker.
  8. Install the powered GPU.
    NOTE This step is required only if the system is configured with powered GPU.
  9. Install the graphics card.
  10. Install the M.2 2230 SSD/M.2 2280 SSD.
  11. Install the WLAN.
  12. Install the memory module.
  13. Install the front bezel.
  14. Install the side cover.
  15. Follow the procedure in after 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. You must make the appropriate changes again after you replace the system board.

Rate this content

Accurate
Useful
Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\