20
IND100077-8
INB100025-1 (Rev 3)
General - Appendix
Basic Trouble-shooting
COMMON ERRORS:
(Applies for Display products and Panel / Maritime / Rack Computers)
If for some reason there should be something wrong with the picture quality or no picture present,
check the symptoms carefully and try to cure it with the hints below:
NO PICTURE / LED BEHAVIOUR:
If there is no light at all in the LED at the FRONT, check power cables. If the LED in front is green
then check if the brightness knob is turned to the right (max brightness). If still no picture, check
if there is a VGA signal on the External VGA connector. If you have a picture on the external VGA
connector please look in BIOS documentation/chapter for correct display settings in BIOS.
Lack of image is most likely to be caused by incorrect connection, lack of power, or wrong BIOS
settings.
SCROLLING / UNSTABLE IMAGE:
Signal cable may not be completely connected to computer or TFT display.
Check the pin assignments and signal timings of the display and your video card with respect to
recommended timing and pin assignments. Make sure that the video card is compatible and that it
is properly seated / installed on the computer.
DISPLAY AREA IS NOT CENTERED / SIZED CORRECTLY
Make sure that a supported video mode has been selected on the display, or on the
video card / system. If it is impossible to position the image correctly, ie the image adjustment
controls will not move the image far enough, then test it again using another graphics card for the
PC system. 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 adverse effect).
If it is impossible to change to the correct resolution/color depth, check if you have the right VGA
driver installed in your system.
IMAGE APPEARANCE:
A faulty TFT panel can have black lines, pixel errors, failed sections, flickering or flashing image.
Incorrect graphics card refresh rate, resolution or interlaced mode will probably cause the image
to be the wrong size, it may scroll, flicker badly or possibly even no image is present. Sparkling on
the display may be a faulty TFT panel signal cable.
CONTINUED FAILURE:
If unit after unit keeps failing, consider and investigate whether you are short circuiting the
equipment or doing something else seriously wrong.
DEW CONDENSATION BEHIND GLASS:
Power on the TFT product and set brightness to 100%. Turn off any automatic screensavers on
PC or similar. During minutes the dew will be gone. To speed up the process, use a fan heater for
a reasonable time. Do not overheat the TFT product.
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