Operating instructions

7.3 Power Problems
Table 7–5 Troubleshooting Power Problems
If the power indicator is: Check:
Off
• 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.
On for a few seconds and Power supply fan. Listen to hear if the power
then goes Off 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.
On, but the monitor
• Monitor power indicator is On.
screen is blank
• 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.
7-6 DS25 Owner’s Guide