Replace A Failed Power Supply - IBM F10 Service Manual

Replace a Failed Power Supply

Problem Indicators
There may be a problem with a power supply when one or more of the following
occur:
v Amber Fault LED on power supply FRU is lit
v Software reports a power supply error
Tools/Equipment
Replacement power supply FRU
Instructions
Use this procedure to replace a failed power supply.
Note: A glowing amber LED on a power supply does not necessarily
indicate a hardware failure. If both power supplies are running and
you turn off one of the power switches, the green LED on that FRU
will go off and its amber LED will turn on. When you turn on the
power again, the amber LED will turn off and the green LED will turn
on again.
1. If applicable, remove the panel (or open the door) on the back of the cabinet to
gain access to the drive module.
2. Check the LEDs on the back of the drive module (Figure 95 on page 184).
Look at the power supply FRUs and select one of the following that matches
their current LED status:
v Green LEDs are on and amber LEDs are off. Power supplies are working
properly. No action required. End of procedure.
v One or both amber LEDs are on. Go to Step 3 on page 184.
v All LEDs are off. Go to Step 4 on page 185.
v Other amber LEDs are lit (on front panel or other FRUs). Go to the "Drive
Module Troubleshooting Chart" on page 198 for further instructions.
Chapter 12. Servicing the Power System
183