Replacing The Motherboard Rtc Battery - Cisco UCS C240 M4 Installation And Service Manual

Chapter 3 Maintaining the Server

Replacing the Motherboard RTC Battery

There is danger of explosion if the battery is replaced incorrectly. Replace the battery only with the
Warning
same or equivalent type recommended by the manufacturer. Dispose of used batteries according to
the manufacturer's instructions. [Statement 1015]
The real-time clock (RTC) battery retains system settings when the server is disconnected from power.
The RTC battery is on the motherboard near the RAID controller card socket (see
The battery type is Panasonic CR2032 or equivalent.
Power off the server as described in
Step 1
Step 2 Slide the server out the front of the rack far enough so that you can remove the top cover. You might have
to detach cables from the rear panel to provide clearance.
If you cannot safely view and access the component, remove the server from the rack.
Caution
Remove the top cover as described in
Step 3
Remove the battery from its holder on the motherboard (see
Step 4
a.
b.
Install an RTC battery. Insert the battery into its holder and press down until it clicks in place.
Step 5
Note
Replace the top cover.
Step 6
Replace the server in the rack, replace cables, and power on the server by pressing the Power button.
Step 7
OL-32474-01
Use a small screwdriver or pointed object to press inward on the battery at the prying point (see
Figure 3-23).
Lift up on the battery and remove it from the holder.
The positive side of the battery marked "3V+" should face upward.
Shutting Down and Powering Off the Server, page
Removing and Replacing the Server Top Cover, page
Figure
Cisco UCS C240 M4 Server Installation and Service Guide
Installing or Replacing Server Components
Figure 3-23).
3-9.
3-23):
3-10.
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