Acer Altos R710 - Manual (Page 154)

5 BIOS setup 142
Clearing the CMOS
If you are not able to access the BIOS setup screens, the CMOS Clear
jumper will need to be used to reset the configuration RAM. The CMOS
Clear jumper is shown on the line labeled “C” in the figure below.
1
Power down the system and disconnect the AC power.
2 Open the server.
3 Move the jumper from the normal operation position, CMOS Clear
by BMC, at pins 1 and 2 to the CMOS Clear Force Erase position,
covering pins 2 and 3 as indicated in the following diagram.
4 Reconnect the AC power, power up the system.
5 When the system begins beeping, power it down and disconnect
the AC power.
6 Return the CMOS Clear jumper to the CMOS Clear by BMC
location, covering pins 1 and 2.
7 Close the server chassis.
8 Reconnect the AC power and power up the system.