PWR1920

For important safety information before continuing with this procedure, see Power isolation procedures.

Refer to Locating FRUs for instructions for removing and replacing any FRUs called out by the following procedure.

1. Activate the lamp test by performing one of the following:
   • Select function 04 lamp test on the control panel and press Enter.
   • Sign on to ASMI and click System Configuration -> Service Indicators -> Lamp Test.
2. Look at the server control panel and the display panels on all attached I/O towers. The lamp test is active only for 25 seconds after you press Enter. Check the following lights on the server control panel and all I/O enclosures and towers:
   • Power-on light.
   • Attention light.
   • All dots for the 32 character display.
   Are all the lights on the control panel and the I/O display panels on?
   • No: Go to step 4.
   • Yes: These control panel lights are working correctly. Continue with the next step.
3. Are any abnormal characters or character patterns (not reference codes or normal display mode) displayed?
   • No: The lights are operating correctly.

     This ends the procedure.

   • Yes: Continue with the next step.
4. Verify that all cables are seated correctly. If the problem persists, replace the control panel. If the problem still persists, use the following table to determine the possible causes for the lamp test failure:

   Table 39. Failing unit

   Failing unit	FRU
   8204-E8A and 9409-M50	System backplane
   5088, 0588	Tower backplane assembly
   5094, 5294, 8094-002	Tower backplane assembly
   5095, 0595	Tower backplane assembly
   7311-D11, 7314-G30, 5790 or 5796	I/O backplane
   7311-D20	I/O backplane