3-8 Troubleshooting
1. AC must be removed to reset this error, the key switch has no affect.
2. The key switch must be switched to STANDBY, then ON to reset this error.
3. The following diagram explains how to decode this error:
4. Any card in the system could cause a DC undervoltage. It may be necessary to remove cards until a
minimum configuration is achieved. Replace the defective assembly that is causing the undervoltage.
POWER FAIL
POWER SHUTDOWN
5 AC is not available or is out of
specification
1. Check power source
2. Replace PM card
3. Replace Power Supply
SWITCH ON
6 1. Bad power supply fan
2. Failed power supply
1. Replace power supply fan.
2. Replace power supply.
PROCEEDING TO
TURN DC ON
POWER FAIL
POWER SHUTDOWN
blank with no
backlight
AC is not available or is out of
specification
1. Check power source
2. Check for defective key switch
OS message with
no backlight
1
7
Power monitor microprocessor is
not functioning
1. Replace Power Monitor card
Table 3-4. Error Messages
Display Panel Message Cause Action
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