Dell Precision T5500 (Early 2009) - Manual (Page 39)

Chassis Intrusion Switch
Dell Precision™ T5500 Service Manual
Removing the Chassis Intrusion Switch
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the computer cover .
3. Lift up the expansion card retention arm.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.