IBM H Series Installation And Service Manual page 70

Step 1520-25
Install the parts listed below in order. After each, verify that the operator panel dis-
plays OK. If not, the last part that was installed is defective. Replace it and go to
"MAP 410: Repair Checkout" in Diagnostic Information for Multiple Bus Systems.
1. Fan monitor control card
2. Processor card(s)
3. Memory card(s)
If no defective FRU is found, go to "Step 1540-1" on page 2-38.
Step 1520-26
Remove the system board.
Is anything displayed on the operator panel?
NO Replace the parts listed below in order. After each, observe if anything
displays on the operator panel. If something displays, the last FRU
replaced is defective. Replace it and go to "MAP 410: Repair Checkout"
in Diagnostic Information for Multiple Bus Systems.
1. I/O board
2. Power Distribution Board
3. I/O cable from the Power Distribution Board to the I/O board
If no defective FRU is found, go to "Step 1540-1" on page 2-38.
YES The system board is defective. Replace it and go to "MAP 410: Repair
Checkout" in Diagnostic Information for Multiple Bus Systems.
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RS/6000 Enterprise Server Model H Series Installation and Service Guide