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TROUBLESHOOTING
General
A general guide to troubleshooting a flat panel display system it is worth considering the system as
separate elements, such as:
Controller (jumpers, PC settings)
Panel (controller, cabling, connection, panel, PC settings)
Backlight (inverter, cabling, backlight tubes)
Cabling
Computer system (display settings, operating system)
Through step-by-step cross checking with instruction manuals and a process of elimination to
isolate the problem it is usually possible to clearly identify the problem area.
Image appearance:
A faulty panel can have blank lines, failed sections, flickering or flashing display.
Incorrect graphics card refresh rate, resolution or interlaced mode will probably cause the
image to be the wrong size, to scroll, flicker badly or possibly even no image.
Incorrect jumper settings on the controller may cause everything from total failure to incorrect
image.
CAUTION:
Do not set the panel power input incorrectly.
Image position
:
If it is impossible to position the image correctly, the image adjustment controls will not move
the image far enough, then test using another graphics card. This situation can occur with a
custom graphics card that is not close to standard timings or if something is in the graphics
line that may be affecting the signal such as a signal splitter (please note that normally a
signal splitter will not have any bad effect).
No image:
If the panel backlight is not working it may still be possible to just see some image on the
display.
A lack of image is most likely to be caused by incorrect connection, lack of power, failure to
provide a signal or incorrect graphic card setting.
Backlight:
Items to check include: Power input, Controls, Inverter and Tubes generally in this or der.
Continued failure:
If unit after 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.
