Hatteland Display 26 inch - HD 26T21 MMD (Widescreen, Touch Screen) - Manual (Page 124)

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Appendix
Basic Trouble-shooting
GENERAL ISSUES FOR TFT PANEL BASED PRODUCTS
Note: Applies for a range of various products. This is only meant as a general guide.
N O 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 is set/adjusted to max brightness. 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 graphics driver installed in your system.
IMAGE APPEARANCE:
A faulty TFT panel can have black lines, pixel errors, failed sections, flickering or flashing image. Incorrect graphic
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
unit.
GENERAL ISSUES FOR COMPUTER BASED PRODUCTS
Note: Applies for a range of various products. This is only meant as a general guide.
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.