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The following illustration shows the status of the jumpers on the system board of your server. You can
congure, recover, enable, or disable some specic features of the system board by setting the jumpers.
Figure29. System board jumpers
1 Clear CMOS (Complementary Metal Oxide
Semiconductor) /Recovery jumper
4 Clear password jumper
2 BMC setting jumper 5 Manufacturing jumper (reserved for the manufacturer)
3 BIOS recovery jumper
Attention: To set the jumpers, you need to open the server cover. Do not open your server or attempt any
repair before reading and understanding the “Safety information” on page iii and “Guidelines” on page 83.
1 Clear CMOS /Recovery jumper
Used to clear CMOS and recover your server to the factory default settings.
Note: After clearing CMOS, all your BIOS passwords are erased and the BIOS recovers to the factory
default settings.
To clear CMOS, do the following:
1. Remove all media from the drives and turn off all attached devices and the server. Then, disconnect all
power cords from electrical outlets and disconnect all cables that are connected to the server.
2. Remove the server cover. See “Removing the server cover” on page 85.
48 ThinkServer Hardware Maintenance Manual