
16-18 Troubleshooting startup problems
Power problems
Standard 1.0 Modular Option EC Installation and Maintenance Guide November 1999
Power problems
Preliminary action
Before proceeding to the DC section or the AC section, follow
these steps.
If the problem is not fixed, refer to “Resolving DC system
power problems” below or “Resolving AC system power
problems” on page 16-22 as appropriate.
Resolving DC system
power problems
To resolve DC system power problems, follow these steps.
Step Action
1 Power off all modules.
2 Loosen and reseat all power supplies.
3 Power on all modules.
Step Action
1 Remove the front doors from all modules in the system.
2 If no LEDs are lit on any module, go to “Testing the pedestal
power supply” on page 16-19.
3 If no LEDs are lit on any module above a certain module, go to
“Testing the power harness” on page 16-20 and test the power
harness at the lowest module with no LEDs lit.
4 If no LEDs, including the LEDs on the CEPS, are lit on a single
module or on a single side of a module, go to “Testing the
DCEPS” on page 16-21.
Note:
A side of a module that contains a power supply but no
PCPs or disk drives will give a DCEPS failure indicator.
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