Compaq 127507-008 - Deskpro EP - 64 MB RAM Software Reference Manual page 45

3-18 Intelligent Manageability
Because there is no video or hard drive support from the Boot
Block ROM, the keyboard lights communicate information.
When the Boot Block detects an invalid system ROM, the
system sounds a series of beeps (one long and three short) and
flashes the three keyboard lights.
To recover the system after hearing the FailSafe Boot Block
beeps, complete the following steps:
1. Remove any diskettes from the diskette drive and turn off
the power.
2. Insert a ROMPaq diskette into the diskette drive.
3. Turn on power to the system.
If a setup password has been established, the Caps Lock
light will turn on.
4. Enter the setup password.
If the system successfully starts from the diskette and
successfully reprograms the ROM, then the three keyboard
lights will turn on. A "rising tone" series of beeps also
signals successful completion.