a.  Disconnect the cable of the intrusion switch from the system board. For the location of the 
intrusion switch connector and cable routing information, refer to 
“System-board-assembly 
connectors” on page 33
and “Intrusion switch” on page 226. Route the cable out of the cable 
clip.
b. 
Insert the tip of a slotted screwdriver into the gap between the cage and switch and push 
backward.
c. 
Slide the intrusion switch as shown to remove it.
Step 4.  Re-install the number 4 fan. 
After you finish
If you are instructed to return the old intrusion switch, follow all packaging instructions and use any 
packaging materials that are provided.
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ThinkSystem SR635 V3 User Guide