Turn off all peripheral devices connected to the computer and disconnect the computer power cord from the AC power source.
Remove the bottom chassis cover.
Move the yellow configuration jumper from pins 1-2 to pins 2-3.
Plug AC power back in and turn on the computer.
The computer should automatically boot into BIOS Setup Maintenance Mode.
Press F9 to restore BIOS factory default values.
Press F10 to save and exit BIOS.
Turn off the computer and disconnect AC power.
Move the yellow configuration jumper back to pins 1-2.
Replace the computer cover.
Reconnect power and turn on the computer.