Dell OptiPlex 990 (Early 2011) - Manual (Page 25)

8
Chassis Intrusion Switch
Removing The Chassis Intrusion Switch
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the cover .
3. Disconnect the intrusion switch-cable from system board.
4. Slide the intrusion switch toward the chassis bottom and remove it from the
system board.
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