Power Problems; Troubleshooting Power Problems - Compaq AlphaServer DS20E Reference Manual

8.3

Power Problems

Table 8–2 Troubleshooting Power Problems
If the power indicator is:
OFF
ON for a few seconds and
then goes OFF
ON, but the monitor
screen is blank
8-4 DS20E Reference Guide
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Check:
•
Front-panel power switch
•
Power at the wall receptacle
•
AC cord
•
Power cable connectors
•
Side cover (pedestal) or top cover (rack).
Interlocking sensor switch shuts off power if the
cover is removed.
Unplug the power cords for 15 seconds, then
reconnect.
Power supply fan. Listen to hear if the power
supply fan is spinning at power-up. A failure of the
fan causes the system to shut down after a few
seconds.
NOTE: The power supply shuts off within one
second if its internal fan fails.
•
Monitor power indicator is ON.
•
Video cable is properly connected.
•
SRM console environment variable setting.
NOTE: A black raster is displayed if the
console environment variable is set to serial
mode rather than graphics mode.