Lenovo ThinkSystem SR645 Maintenance Manual page 122

S002
CAUTION:
The power-control button on the device and the power switch on the power supply do not turn off the
electrical current supplied to the device. The device also might have more than one power cord. To
remove all electrical current from the device, ensure that all power cords are disconnected from the
power source.
Attention:
• Read Installation Guidelines to ensure that you work safely.
• Power off the server and disconnect all power cords for this task.
• Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-
sensitive components in their static-protective packages until installation, and handling these devices with
an electrostatic-discharge wrist strap or other grounding system.
A video for this task is available at:
• Youtube: https://www.youtube.com/playlist?list=PLYV5R7hVcs-DY1RaWHYM4xDloAwuBQHR0
• Youku:
http://list.youku.com/albumlist/show/id_52339628
Procedure
Step 1. Remove the top cover. See Remove the top cover.
Step 2. Remove any parts and disconnect any cables that might impede your access to the CMOS battery.
Step 3. Locate the CMOS battery. See System board components.
Step 4. Open the battery clip as shown and carefully take the CMOS battery out of the socket.
Attention:
• Failing to remove the CMOS battery properly might damage the socket on the system board.
Any damage to the socket might require replacing the system board.
• Do not tilt or push the CMOS battery by using excessive force.
Figure 36. CMOS battery removal
After you finish
1. Install a new one. See Install the CMOS battery.
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