Dell PowerEdge R905 - Manual (Page 149)

Troubleshooting Your System
149
5 If you have remote access to your system, use a remote host to access the
system’s System Setup program and enable the USB ports. If remote
access is not available, proceed to the next step.
If enabling the USB ports does not resolve the problem, see "Getting Help"
on page 181.
6 If you do not have remote access to your system, use the following
procedure to set the NVRAM_CLR jumper inside your system and restore
the BIOS to its default settings.
CAUTION:
Many repairs may only be done by a certified service technician. You
should only perform troubleshooting and simple repairs as authorized in your
product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered
by your warranty. Read and follow the safety instructions that came with the
product.
a Turn off the system and attached peripherals and unplug the system
from the power source.
b Open the system. See "Opening the System" on page 67.
c Locate the NVRAM_CLR jumper on your system board (see "System
Board Jumpers" on page 173) and set the jumper to the enabled
position.
d Close the system. See "Closing the System" on page 68.
e Reconnect the system and peripherals to power and restart.
If the mouse and keyboard are operational, proceed to the next step.
If the mouse and keyboard are still not operational, see "Getting Help"
on page 181.
f Repeat step 2 and step b.
g Set the NVRAM_CLR jumper to the disabled position.
h Close the system.
i Reconnect the system to power and restart the system and attached
peripherals.
j Enter the System Setup program and reenter any custom BIOS
settings that were reset. Be sure to leave all USB ports enabled.