NCR RealPOS 5953 User Manual page 77

Symptom
Speaker not working
MSR not working
Scanner not working
LCD Dim/Contrast
too Light or Dark
Lines in LCD Display Internal LCD harness loose
Probable Cause
Speaker harness not connected
MSR card not oriented properly
MSR harness loose or broken
Scanner not powered
Unit is cold
Unit is in direct sunlight
Bent pin in external LCD cable
Chapter 6: Hardware Service
Solution
Connect speaker harness to
DynaKey Controller Board.
Ensure that magnetic stripe on
card is up when swiped.
Ensure that the MSR harness
is securely fastened to the
DynaKey Controller Board,
and that none of the wires
have pulled loose from the
connector.
Possible shorted condition.
Power for USB devices is
controlled by a USB
distribution switch.
Wait 15 minutes for unit to
reach operating temperature
before measuring brightness
or contrast. Do not expose the
unit to operating temperatures
below 5 degrees C.
For best display quality, keep
the unit out of direct sunlight
or other bright light sources.
Re-seat the LCD harness at the
DynaKey Controller Board
and LCD ends.
Check both ends of the LCD
cable for bent pins. Fix or
replace cable.
6-3