NCR 5965, User Manual, Page: 56 / 91

4-6 Chapter 4: Problem Isolation Procedures
Condition: Audio not Working or Imbalanced
1. Check that the external audio cable does not have an open conductor and is properly
attached at both the terminal and the display end.
2. Check the audio driver settings (in the terminal’s control panel), pay specific attention to
the
volume
and
balance
settings.
3. Check the 5965’s OSD volume and mute setting.
4. Check that the internal audio cable harness is properly connected.
5. Replace internal speaker assembly.
6. Replace the main Controller Board and then perform the
Calibration
procedure.
Condition: OSD Controls not Functioning Correctly
1. Check that the OSD control board is mounted correctly in the front bezel and that the
button tree is mounted correctly in the rear bezel.
2. Check that the grounding lug near the OSD wiring harness does not short to nearby traces
on the OSD board.
3. Ensure that the wiring harness connecting the OSD control board to the main Controller
Board is not damaged and that the connectors are properly seated at both ends of the
harness.
4. Replace the OSD control board.
5. Replace the main Controller Board and then perform the
Calibration
procedure.
Continued failure
If the unit keeps failing, consider and investigate whether you are short circuiting the
equipment or doing something else seriously wrong. Generally, after common sense issues
have been resolved we recommend step-by-step substitution of known working parts to
isolate the problem.