Dell OptiPlex 790 (Early 2011) - Manual (Page 21)

7
Chassis Intrusion Switch
Removing the Chassis Intrusion Switch
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. Disconnect the intrusion cable from system board.
6. Slide the intrusion switch over and remove it off the bracket.
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