IBM RS/6000 Enterprise Server M80 Service Manual page 93

Symptom
All display problems.
You cannot power on the system.
The power on/off LED on an I/O drawer operator panel
does not come on or stay on. (Both the I/O drawer
operator panel power-on/off LED and the I/O drawer
power supply LEDs do not come on or stay on.)
A rack or a rack mounted unit will not power on.
You have a power problem.
The system attention LED on the primary I/O drawer
operator panel is on and there is no SRN displayed.
A flashing 888 is displayed in the primary I/O drawer
operator panel display.
The operator panel displays OK. Fans and blowers are
off.
All of the system POST indicators are displayed on the
system console, the system pauses and then restarts.
POST indicators refers to the device mnemonics (words
memory, keyboard, network, scsi, and speaker) that
appear on the system console during the power-on
self-test (POST).
The system stops and all of the POST indicators are
displayed on the system console. POST indicators refers
to the device mnemonics (words memory, keyboard,
network, scsi, and speaker) that appear on the system
console during the power-on self-test (POST).
The system stops and the message STARTING SOFTWARE
PLEASE WAIT... is displayed on the system console.
Action
1. If using a graphics display:
2. If using an ASCII terminal:
Power and Cooling Problems
Go to "MAP 1520: Power" on page 83.
Go to "MAP 1520: Power" on page 83.
Go to "MAP 1520: Power" on page 83.
Go to "MAP 1520: Power" on page 83.
Go to "MAP 1520: Power" on page 83.
888 sequence in Operator Panel Display
Go to the "Fast Path MAP" in the RS/6000 and Eserver
pSeries Diagnostic Information for Multiple Bus Systems.
Other Symptoms or Problems
The service processor (SP) is ready. The system is
waiting for power on.
Go to "Boot Problems and Concerns" on page 155.
Go to "MAP 1540: Minimum Configuration" on page 110
to isolate the problem.
Go to Chapter 4, "Checkpoints," on page 135.
a. Go to the problem determination procedures for
the display.
b. If you do not find a problem, replace the display
adapter.
c. If you do not find a problem, suspect the I/O
planar. Go to "MAP 1540: Minimum Configuration"
on page 110.
a. Make sure that the ASCII terminal is connected to
S1.
b. If problems persist, go to the problem
determination procedures for the terminal.
c. If you do not find a problem, suspect the I/O
planar. Go to "MAP 1540: Minimum Configuration"
on page 110.
Chapter 3. Maintenance Analysis Procedures
75