Symptom Action
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.
Go to “MAP 1520: Power” on page 2-10.
The power light does not come on, or stay on. Go to “MAP 1520: Power” on page 2-10.
The power light on the operator panel is on, but
nothing is displayed on the system console, and
the operator panel is blank.
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 2-25.
All display problems. 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 2-25.
888 is displayed in the control panel followed by
additional error codes.
Go to the Fast Path MAP in the
Diagnostic
Information for Multiple Bus Systems
.
The system stops and a 4-digit number is dis-
played in the operator panel display.
If the number displayed begins with the char-
acter "E0xx" then go to “SP Checkpoints” on
page 3-30. or "E1xx-EFFF" then go to
“Checkpoints” on page 3-29.
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
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