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Lenovo ThinkCentre M90a - Appendix A. Important safety information; Safety notices; Conditions that require immediate action

Lenovo ThinkCentre M90a
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Figure 51. Installing the storage drive and the bracket
7. Reinstall the removed parts.
8. Place the computer in an upright position.
9. If a locking device is available, use it to lock the computer.
10. Reconnect the external cables and power cords to the corresponding connectors on the computer.
System fan
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. Disconnect the system fan cable from the system board.
7. Depending on your computer model, refer to one of the following to replace the system fan.
M70a
Chapter 6. Hardware removal and installation 83

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