BenQ Q74A Service Manual page 17

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Color error include OSD menu
Color error except OSD ment.
Key button error
Brightness differ between upper and
lower on screen.
Q74A Service Manual
Check the panel harness.
Check scaler output signal.
Check the signal cable.
Check pins of the signal cable.
Check input/output signal of the signal cable
Check the function(key) harness.
Check the function ass'y (mechanical).
Because of viewing angle.
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