Dell OptiPlex 9020 (Mid 2013) - Manual (Page 27)

Installing the Processor
1. Insert the processor into the processor socket. Ensure the processor is properly seated.
2. Gently lower the processor cover.
3. Press the release lever down and then move it inward to secure it with the retention hook.
4. Install the heat-sink assembly.
5. Install the cover.
6. Follow the procedures in After Working Inside Your Computer .
Removing the Intrusion Switch
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the:
a) cover
b) heat sink assembly
3. Disconnect the intrusion-switch cable from the system board.
4. Slide the intrusion switch toward the bottom of the chassis and remove it from the computer.
Installing the Intrusion Switch
1. Insert the intrusion-switch into the chassis rear and slide it outward to secure it.
2. Connect the intrusion-switch cable to the system board.
3. Install the:
a) heat sink assembly
b) cover
4. Follow the procedures in After Working Inside Your Computer .
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