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G5 5090 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

Figure 1. System-board components
Image: System-board components
  1. wireless-card slot
  2. hard-drive data cable connector (SATA0)
  3. hard-drive power cable connector (SATA PWR)
  4. coin-cell battery
  5. power-supply unit cable connector
  6. graphics-card slot
  7. solid-state drive connector (m.2 PCIe SSD)
  8. chassis-fan cable connector (FAN SYS)
  9. processor
  10. processor-power cable connector (ATX CPU1)
  11. processor-power cable connector (ATX CPU)
  12. processor-fan cable connector (FAN CPU)
  13. memory-module slot (DIMM3)
  14. memory-module slot (DIMM1)
  15. memory-module slot (DIMM4)
  16. memory-module slot (DIMM2)
  17. front LED cable connector (PWR SW)

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

Image: Installing the system board

Image: Installing the system board

Image: Installing the system board

Steps

  1. Slide the back 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 screw (M2x4) that secures the system board to the chassis.
  3. Install the VR heat sink.
    NOTE: The VR heat sink is shipped as a separate unit and it does not ship along with the system board. Ensure that you replace the VR heat sink from old system board to the new system board.
  4. Replace the eight screws (#6-32) that secure the system board to the chassis.
  5. Route and connect all the cables that you disconnected from the system board.
    NOTE: For information on system-board connectors, see “System-board components”.
  6. Align the front I/O-bracket with the slots on the chassis.
  7. Replace the screw (#6-32) that secures the front I/O-bracket to the chassis.

Next steps

  1. Install the LED daughter board.
  2. Install the processor.
  3. Install the processor fan and heat-sink assembly.
  4. Install the coin-cell battery.
  5. Install the graphics card.
  6. Install the solid-state drive/Intel Optane.
  7. Install the wireless card.
  8. Install the memory module.
  9. Install the front cover.
  10. Install the light bar.
  11. Install the left-side cover.
  12. 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 you have made to the BIOS using the BIOS setup program. You must make the appropriate changes again after you replace the system board.

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