Dell OptiPlex 9010 (Mid 2012) - Manual (Page 16)

5. 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 cover.
3. Disconnect the intrusion-switch cable from the system board.
4. Slide the intrusion switch inwards and remove it from the system board.
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