Dell OptiPlex 990 (Early 2011) - Manual (Page 29)

Processor
10
Removing the Processor
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 heat sink .
6. Press the release lever down. Then move it outward to release it from the
retention hook that secures it.
7. Raise the processor cover.
8. Lift the processor to remove it from the socket and place it into an antistatic
packaging.
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