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Chapter 7: Troubleshooting and Support
7.7 CMOS Clear
consists of contact pads to prevent accidentally clearing the contents of CMOS.
To Clear CMOS
1. First power down the system completely.
2. Remove the cover of the chassis to access the motherboard.
3. Remove the onboard battery from the motherboard.
4.
seconds.
5. Remove the screwdriver or shorting device.
6. Replace the onboard battery and chassis cover, and reconnect the power cords, then
power on the system.
Notes: Clearing CMOS will also clear all passwords.
Do not use the PW_ON connector to clear CMOS.
JBT1 contact pads
7.8 BMC Reset
The BMC can be reset using the UID button.
• Reset – Press and hold the UID button. After six seconds, the LED blinks at 2Hz. The
BMC resets and the reset duration is approximately 250 ms. Then the BMC starts to boot.
•
Note: All BMC settings including username
and password will be removed except the FRU and network settings.
BMC Reset Options
Event UID LED BMC Heartbeat LED
Reset Blue, Blinks at 2Hz Green, solid
Restore
Defaults
Blue, Blinks at 4Hz
Update Blue, Blinks at 10Hz
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