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W450321A 09/12
2.2 Display Console Problems
Display console problems can be difficult to isolate due to the interaction between the display and the
computer unit. Failure of either unit or the cabling connecting the units can cause a malfunction. “No
Fault Code” diagnoses of other system problems can be completed without the display and it’s
communication with the computer unit.
To solve problems using the display indications, observe the display at “Power On” and through the
self-test. Use the following chart to help with the diagnosis.
There are no display indications in any of the
windows when the power is turned on.
Or a “No Communications” message appears.
Refer to Computer Internal Status
Indicators.
The display unit does not cycle through the
self-test. The data in the display windows
appears jumbled with missing segments.
Replace the display unit.
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