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Step 1540B-6
One of the FRUs remaining in the system unit is defective.
1. Turn the power off.
2. Exchange the following FRUs the order listed.
a. System board (See notes on page 2-1)
b. Power supply
3. Turn the power on.
Does the operator panel stabilize for more than 60 seconds with code FDC,
FF2, FF3, or F4D displayed, or is one of these codes displayed immediately
before the system unit attempts to restart?
NO Reinstall the original FRU.
Repeat this step until the defective FRU is identified or all the FRUs have
been exchanged.
If the symptom did not change and all the FRUs have been exchanged,
call your service support person for assistance.
If the symptom has changed, check for loose cards, cables, and obvious
problems. If you do not find a problem, return to “Step 1540B-1” on
page 2-39 in this MAP, and follow the instructions for the new symptom.
YES Go to "Map 0410: Repair Checkout" in the Diagnostics Information for
Multiple Bus Systems.
Chapter 2. Maintenance Analysis Procedures (MAPs) 2-43