Dell OptiPlex 990 Desktop, Service Manual

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System Board
15
Removing the System Board
1. Follow the procedures in
Before Working Inside Your Computer
.
2. Remove the
cover
.
3. Remove the
front bezel
.
4. Remove the
drive cage
.
5. Remove the
power supply
.
6. Remove the
heat sink
.
7. Remove the
memory
.
8. Remove the
input/output panel
.
9. Remove the
wireless module
.
10. Remove the
speaker
.
11. Disconnect all the cables connected to the system board, and move the
cables away from the chassis.
12. Unthread and move the internal antenna from the chassis.
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