Lenovo 70AL Maintenance Manual page 138

This section provides instructions on how to replace the cover presence switch (intrusion switch). This topic
applies only to server models that have the cover presence switch installed.
Note: Depending on the model, your server might look slightly different from the illustrations in this topic.
To replace the cover presence switch, do the following:
1. Remove all media from the drives and turn off all attached devices and the server. Then, disconnect all
power cords from electrical outlets and disconnect all cables that are connected to the server.
2. Remove the server cover. See "Removing the server cover" on page 67.
3. Locate the cover presence switch. See "Server components" on page 22.
4. Disconnect the cable of the cover presence switch from the cover presence switch connector on the
system board. See "System board components" on page 38.
5. Remove the screw that secures the cover presence switch assembly. Then, push the cover presence
switch assembly to the front of the chassis until it is released from the chassis, and then remove
it out of the chassis.
Figure 78. Removing the cover presence switch assembly
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ThinkServer TS440 Hardware Maintenance Manual