Digital Equipment AlphaServer 2000, Owner'S Manual, Page: 148 / 196

Power Problems
Power Problems
This section describes how to troubleshoot the system when
there is no power at the system enclosure or when the power
supply subsystem lights indicate power trouble.
Table 4–5 Troubleshooting Power Problems
Symptom Action
No AC power.
• Check the power source and power cord.
• Check that the system cover is properly secured.
A safety interlock switch shuts off power to the
system if the cover is removed.
• If there are two power supplies, make sure that
both power supplies are plugged in.
AC power is present, but
system does not power on.
• Check the DC On/Off button setting on the operator
control panel.
• Check that the ambient room temperature is within
environmental specifications (10–35°C, 50–95°F)
• Check power configuration rules. If you have two
CPUs, you need two power supplies.
• Check that internal power supply cables are
plugged in at the right place on both the power
supply and system backplane.
Power supply shuts down
after approximately 5 seconds
(fan failure). Using a flashlight, look through the front (to the left
of the internal StorageWorks shelf) to determine if the
6.75-inch fan is spinning at power-up. A failure of the
6.75-inch fan causes the system to shut down after
approximately 5 seconds.
4–10 Troubleshooting the System