Compaq DS20E - AlphaStation - 1 GB RAM User Manual page 223

If the system does not power up
Are the power cords plugged in?
Are the cover and side panels closed and the interlock engaged?
The cover interlock must be engaged to enable power-up. See Figure 8–1 for
the interlock location.
If the system comes up and approximately 30 seconds later goes
down, possible failures are:
CPU fan failure
System fan failure
Power supply fan failure
Overtemperature condition
If you hear a single beep
A single beep indicates that the firmware in flash ROM is corrupt: The fail-safe
loader will load and run immediately if you have a serial console terminal. Press
reset if you have a graphics console monitor. The following prompt will appear:
DP264>
Either place a floppy with the most recent firmware on it in the floppy drive (should
have come with the system) or place the AlphaServer Firmware CD-ROM in the CD
drive and at the prompt type:
DP264>fwupdate
Two things will happen:
You will hear a single beep, followed by two beeps, followed by three beeps.
And either
UPD> will appear if you placed a floppy in the floppy drive
Or AlphaBIOS will appear.
In either case refer to Section 3.9 and update the firmware.
If you hear four beeps
The header in the ROM is not valid, and the system will not boot.
If you hear six beeps
Six beeps indicate a checksum error occurred after the ROM image was copied into
memory. Either memory is misconfigured or a memory DIMM needs to be reseated.
Troubleshooting 8-3