The computer’s system board offers two jumpers—a password enables jumper and a RTCRST (Real Time Clock Reset) jumper.
Password Enable Jumper
PSWD -Password enable. The system password will be cleared and disabled when the system is started with this jumper removed.
Pins 1-2 shorted enables password.
NVRAM Reset Jumper
RTCRST -Clears NVRAM. The NVRAM will be cleared when the jumper is closed (use the jumper from the password bridge). To properly clear; AC power must
be applied (not necessarily turned on) to the system for about 10 seconds while the jumper is closed.
Pins 1-2 shorted clear NVRAM
The picture below shows the location of the configuration jumpers on the system board.
NOTE: You can use the RTCRST jumper procedure above to attempt recovery from a No POST, No Video situation.