IBM H Series Installation And Service Manual page 75

Step 1540-3
One of the FRUs remaining in the system unit is defective.
If a memory module is exchanged, ensure that the new module is the same size and
speed as the original module.
Turn the power off, remove the power cable, and exchange the following FRUs in
order:
1. Processor card
2. Memory modules (pair)
3. Memory card
4. Fan monitor control card
5. I/O board (see notes on page 2-1)
6. System board
7. Service processor (Model H50)
8. Power distribution board
Plug in the power cable and wait for OK on the operator panel display.
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 the FRU replacement steps 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 in this MAP and follow the instructions for the new symptom.
YES If the last FRU exchanged was the pair of memory modules go to "Step
1540-7" on page 2-44.
Go to "Map 0410: Repair Checkout" in the Diagnostic Information for Mul-
tiple Bus Systems.
Chapter 2. Maintenance Analysis Procedures
2-41