IBM H Series Installation And Service Manual page 67

Step 1520-18
1. Remove the service processor (Model H50), processor card(s), and memory
card(s) from the I/O board. Disconnect the Fan Monitor Control (FMC) from the
I/O board.
2. Connect Power to the I/O planar and apply AC power to the system.
Is the light on the back of the Power Supply flashing?
NO Replace in order and try again:
1. I/O board
2. System board
If the power supply light starts flashing, then the last FRU replaced is
defective. Go to "MAP 410: Repair Checkout" in Diagnostic Information
for Multiple Bus Systems. If the light still does not flash after replacing all
the FRUs in the list, go to "Step 1540-1" on page 2-38.
YES Go to "Step 1520-19."
Step 1520-19
Perform each of the following steps in order. After each, apply AC power and verify
that the light on the back of the power supply is flashing. If the light is not flashing,
replace the last part connected to the system and go to "MAP 410: Repair Checkout"
in Diagnostic Information for Multiple Bus Systems.
1. Install the Service Processor (Model H50).
2. Connect the FMC to the Power Distribution Board and to the I/O board.
3. Insert the processor card(s), one at a time and connect power.
4. Insert the memory card(s), one at a time.
If no defective FRU is found, go to "Step 1540-1" on page 2-38.
Chapter 2. Maintenance Analysis Procedures
2-33