Installing the system board – Dell OptiPlex 990 (Early 2011) User Manual
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13. Remove the system board from the chassis.
Installing The System Board
1. Align the system board to the port connectors on the rear of the chassis
and place the system board in the chassis.
2. Tighten the 7–mm hex screw securing the system board to the chassis.
3. Tighten the screws securing the system board to the chassis.
4. Close the expansion card latch.
5. Connect the cables to the system board.
6. Connect the intrusion switch cable, SATA cables, Input/Output board cable,
system fan cable, power switch cable, internal speaker cable, and the
power supply cables to the system board.
7. Install the
.
8. Install the
9. Install the
.
10. Install the
11. Install the
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