IBM H Series Installation And Service Manual page 79

Step 1540-8
One of the FRUs remaining in the system unit is defective.
1. Turn the power off and remove the power cable.
2. Exchange the following FRUs in the order listed.
Memory card
System board
I/O board (See notes on page 2-1)
Fan monitor control card
Power supply
Power distribution board
3. Plug in the power cable wait for OK on the operator panel display
4. Turn the power on
Does the system stop with code E1F2, E1F3, STBY, 20EE000B or 4BA00830
displayed on the operator panel?
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 1540-1" on
page 2-38 and follow the instructions for the new symptom.
YES Go to "Map 0410: Repair Checkout" in the Diagnostic Information for Mul-
tiple Bus Systems.
Chapter 2. Maintenance Analysis Procedures
2-45