IBM H Series Installation And Service Manual page 37

Symptom
The power light on the operator panel does not
start flashing within 30 seconds of A/C power
application, or the power light on the operator
panel is flashing but the operator panel is blank.
The power light does not come on, or stay on.
The power light on the operator panel is on, but
nothing is displayed on the system console, and
the operator panel is blank.
All display problems.
888 is displayed in the control panel followed by
additional error codes.
The system stops and a 4-digit number is dis-
played in the operator panel display.
Action
Go to "MAP 1520: Power" on page 2-19.
Go to "MAP 1520: Power" on page 2-19.
1. If using a graphic display, go to the Problem
Determination Procedures for the display.
2. If you do not find a problem then replace the
display adapter.
3. Go to "MAP 1540: Minimum Configuration"
on page 2-37.
1. If using a graphics display, go to the
Problem Determination Procedures for the
display.
2. If you do not find a problem then replace the
display adapter.
3. If the problem is with the ASCII terminal:
a. Make sure that the ASCII terminal is
connected to S1.
b. If problems persist, go to the Problem
Determination Procedures for the ter-
minal.
4. If you do not find a problem then suspect
the I/O board. Go to "MAP 1540: Minimum
Configuration" on page 2-37.
Go to the Fast Path MAP in the Diagnostic
Information for Multiple Bus Systems.
If the number displayed begins with the char-
acter "E0xx" then go to "Model H50 Service
Processor Checkpoints" on page 3-45 or "Model
H70 Service Processor Checkpoints" on
page 3-49. If "E1xx-EFFF" is is displayed, then
go to "Firmware Checkpoints" on page 3-52.
For all other numbers record SRN 101-xxx,
where xxx is the last three digits of the four-digit
number displayed in the operator panel, then go
to the Fast Path MAP in the Diagnostic Informa-
tion for Multiple Bus Systems.
Note: If the operator panel displays 2 sets of
numbers, use the bottom set of numbers as the
error code.
Chapter 2. Maintenance Analysis Procedures
2-3