Cover Presence Switch (Intrusion Switch) - Lenovo ThinkCentre M70a Hardware Maintenance Manual

Figure 114. Installing the coin-cell battery
10. Reinstall the removed parts.
11. Place the computer in an upright position.
12. If a locking device is available, use it to lock the computer.
13. Reconnect the external cables and power cords to the corresponding connectors on the computer.

Cover presence switch (intrusion switch)

Prerequisite
Before you start, read Chapter 1 "Important safety information" on page 1 and print the following
instructions.
Replacement procedure
1. Remove the computer stand. See "Computer stand" on page 61.
2. Remove the rear cover. See "Rear cover" on page 65.
3. Remove the optical drive. See "Optical drive" on page 66.
4. Remove the optical drive holder. See "Optical drive holder" on page 69.
5. Remove the system board shield. See "System board shield" on page 71.
6. Remove the storage drive. See "Storage drive and storage drive bracket" on page 78.
7. Disconnect the cover presence switch cable (intrusion switch cable) from the system board.
8. Depending on your computer model, refer to one of the following to replace the cover presence switch
(intrusion switch).
• M70a
.
Chapter 6 Hardware removal and installation
113