IBM iSeries Series Hardware Problem Analysis And Isolation page 169

b. Install the AMD that you removed in step 4 (See page 156) into its original location.
c. Repeat step 4 (See page 156).
6. Perform the following:
a. Power off the system.
b. Remove the power supply from the system unit and replace it with the new one.
c. Power on the system.
Does a power reference code occur?
v No: The power supply you just removed is the failing item.
This ends the procedure.
v Yes: Perform the following:
a. Remove the new power supply that you just installed in this step and reinstall the original
power supply.
b. Replace the backplane. See symbolic FRU "BACKPLN" on page 284.
This ends the procedure.
7. Perform the following:
a. Reinstall all of the cards you removed in step 2 (See page 156) of this procedure.
b. Power on the system. Does a power reference code appear?
v No: Go to step 10 (See page 157).
v Yes: Continue with the next step.
8. Perform the following:
a. Power off the system.
b. Disconnect one of the cards you reinstalled in the previous step.
c. Power on the system.
Does a power reference code occur?
v No: Exchange the last card you disconnected in this step. See the Remove and replace
procedures for the model you are working on.
This ends the procedure.
v Yes: Continue with the next step.
9. Have you disconnected all of the cards?
v Yes: Install all of the parts you removed in this procedure and go to the "Starting point for all
problems" on page 2.
This ends the procedure.
v No: Repeat step 8 (See page 157).
10. Perform the following:
a. Power off the system.
b. Reconnect all of the I/O devices (tape, diskette, optical, or disk units) you disconnected in step 2
(See page 156).
c. Power on the system.
Does a power reference code occur?
v No: The system is working. The problem seems to be intermittent. See "Analyze intermittent
problems" on page 11.
This ends the procedure.
v Yes: Continue with the next step.
11. Perform the following:
a. Power off the system.
Analyze hardware problems
157