12. Perform the following:
a. Power off the system.
b. Ensure the keystick is inserted and select Manual mode on the system unit
control panel.
c. Attempt to power on the system.
Does the system power on?
Yes No
↓ Go to step 11 on page 40 of this procedure.
13. Perform the following:
a. Power off the system.
b. Display the selected IPL mode on the system unit control panel. Is the
selected mode the same mode the customer was using when the power-on
failure occurred?
No Yes
↓ Go to step 18 on page 42 of this procedure.
14. Perform the following:
a. Power off the system.
b. Select the mode on the system unit control panel the customer was using
when the power-on failure occurred.
c. Attempt to power on the system.
Does the system power on?
No Yes
↓ Go to step 18 on page 42 of this procedure.
15. Exchange system unit control panel card (see “Chapter 4. Removal and
Installation Procedures” on page 617).
This ends the procedure.
16. Perform the following:
a. Power off the system.
b. Display the selected IPL mode on the system unit control panel (Manual,
Auto, Normal, Secure).
Is the selected mode the same mode the customer was using when the
power-on failure occurred?
No Yes
↓ Go to step 18 on page 42 of this procedure.
17. Perform the following:
a. Power off the system.
b. Select the mode on the system unit control panel the customer was using
when the power-on failure occurred.
c. Attempt to power on the system.
Does the system power on?
Yes No
↓ Exchange the system unit control panel card (see “Chapter 4. Removal
and Installation Procedures” on page 617).
This ends the procedure.
Power Problems
Chapter 1. Starting Problem Analysis 41