Elo TouchSystems JH 23T02 - Manual (Page 45)

5
IND100077-8
INB100014-1 (Rev 19)
Appendix
Basic Trouble-shooting
COMMON ERRORS: (This is a generic description of possible issues for a varity of products)
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, i.e. 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 may 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, and it needs service attention.
RGB Signal Only:
Horizontal interference can usually be corrected by adjusting the PHASE (OSD menu).
Vertical interference can usually be corrected by adjusting the FREQUENCY (OSD menu).
DEW CONDENSATION BEHIND GLASS:
Note that this problem will not occur on bonded products. For non-bonded products, do the following:
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.
CD-ROM FAILURE OR READ/DETECTION PROBLEMS:
If the product are operated/located in a area with extreme condensation, the CD/DVD drive may not work
correctly due to condensation on the read head. Keep the product on for a while until it’s reached normal
operating temperature, and retry accessing discs. Otherwise, consider using USB memory sticks or
alternative storage devices.
NO CD-ROM AVAILABLE ON YOUR PRODUCT FOR INSTALLING DRIVERS/SOFTWARE:
Please use USB memory sticks, USB Floppy drive, USB CD-Rom Drive or alternative storage devices to
transfer/install software on CD-ROM-less units.