IBM RS/6000 H50, Installation And Service Manual

Page: 61 / 327

Step 1540-6
One of the FRUs remaining in the system unit is defective.
1. Turn the power off and remove the power cables.
2. Exchange the following FRUs the order listed.
a. Memory card
b. System board
c. I/O board
d. Fan monitor control card (See notes on 2-1)
e. Power supply
f. Power distribution board.
3. Reinstall the power cables.
4. Turn the power on.
5. Wait for the operator panel to stabilize at a checkpoint.
Note: Checkpoints E1F2, E1F3 and STBY are stable as soon as they appear.
Other checkpoints may take up to 3 minutes to assure stability, depending on
system configuration.
Does the operator panel stabilize with code E1F2, E1F3, E1F7, or STBY?
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 2-26 in this MAP, and follow the instructions for the new symptom.
YES Go to "MAP 410: Repair Checkout" in the Diagnostic Information for Mul-
tiple Bus Systems.
Chapter 2. Maintenance Analysis Procedures
2-31