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Symptom Action
Flashing 888 is displayed in the control panel
followed by additional error codes. Record in
sequence each code that is displayed after the
flashing 888 goes away. Stop recording when
the flashing 888 reappears.
Go to the Fast Path MAP in the Diagnostics
Information for Multiple Bus Systems.
There Appears to be a Display Problem (Blank, Distortion, Blurring, Etc.)
All display problems. 1. If using a graphics display:
a. Go to the Problem Determination
Procedures for the display.
b. If you do not locate the problem, replace
the display adapter.
2. If using an ASCII terminal:
a. Make sure that the ASCII terminal is
connected to Serial Port 1.
b. If the problems persist, go to the
Problem Determination Procedures for
the terminal.
3. If you do not locate the problem, suspect
the system board. Go to “MAP 1540:
Minimum Configuration” on page 2-17.
Power and Cooling Problems
The power LEDs on the operator panel and
power supply do not come on or stay on.
Go to “MAP 1520: Power” on page 2-12.
The power LED on the operator panel comes on
and the system powers on automatically when
A/C power is applied.
Automatic power-up is a feature on the Model
B50. Refer to “System Board Jumper Settings”
on page 1-8 for the correct settings. If the
jumper is set in the disabled position, replace
the system board.
The power LED on the operator panel comes on
and stays on but the system does not power on.
Go to “MAP 1520: Power” on page 2-12.
The cooling fan(s) do not come on or come on
but do not stay on.
Go to “MAP 1520: Power” on page 2-12.
Other Symptoms or Problems
You do not have a determined symptom. Go to “MAP 1020: Problem Determination” on
page 2-6.
The system POST indicators are displayed on
the system console, the system pauses and
then then restarts. The term "POST indicators"
refers to the icons (graphic display) or device
mnemonics (ASCII terminal) that appear during
the power-on self-test (POST).
Go to “Boot Problems or Concerns” on
page 3-27.
Chapter 2. Maintenance Analysis Procedures (MAPs) 2-3