Compaq 247320-003 - Deskpro 4000 - 5166 Model 2500/CDS Reference Manual page 49

Num Caps
Lock Lock
OFF ON
ON OFF
OFF OFF
ON ON
Scroll
Meaning and Required Action
Lock
OFF System requires setup password.
Enter the setup password. The light remains turned on until you
enter a valid setup password.
OFF System could not start from diskette because the ROMPaq
diskette is not present, is bad, or the drive is not ready.
Insert a valid ROMPaq diskette, turn the power off, then turn the
power on.
ON ROM upgrade failed.
Try another ROMPaq diskette. If the light remains turned on,
contact Compaq customer support.
ON ROM upgrade successfully completed.
Turn power off and back on to resume normal system operation.