4-29 Hardware Service
Servicing the Display
Warning: Before servicing the equipment, plug your safety strap into a proper
grounding outlet. Failure to do so could damage the equipment.
Normal Operation
Note: This section is not applicable to NCR 5977 Graphical displays.
On power–up, the unit displays the firmware part number for 2 seconds, then lights all
pixels for 2 seconds, then goes blank and awaits commands from the host.
Troubleshooting Procedures
Note: This section is not applicable to NCR 5977 Graphical displays.
The NCR 5977 Customer Display requires minimal maintenance. Should the display
malfunction, adhere to the procedures in the following troubleshooting chart.
Symptom
Probable
Cause
Solution
Blank screen on
power–up
No power to
the unit
Check for faulty connections
Check the power source to power
supply connection
Check for damaged cables
Check the connections
On power–up, unit
lights but does not
communicate with the
host
Bad cable
connections
to the host
port
Check the connections
Misconfigured
host
Verify the host configuration
Servicing the 5977 Customer Display
If the unit does not perform properly, you need to replace it. It contains no serviceable
parts and must be replaced as a whole display unit.
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