15 subject to change without prior notice 05.2004
Preh KeyTec GmbH, www.preh-keytec.com
6.2 Troubleshooting list
A lot of malfunctions can be traced back to incorrect or loose cable connection. So
please make sure that all plug connections are correct and secured.
Fault Possible cause Remark
voltage supply not in
order
check plug-in connection of power
supply
LED on Touch / Screen
Commander remains dark
computer switched off switch on the computer
LED on Touch / Screen
Commander lights up red
and no picture appears
VGA cable is not
correctly connected
check cable connection of VGA
connection
choice of display
resolution is wrong
check for correct display resolution
it should be 1024x768 or less
The display shows only
part of the picture or the
picture is distorted
display adjustment
insufficient
see notice to adjustment of in
chapter 3.3
LCD shows indistinct
vertical stripes
display ("HORIZONTAL
SIZE") is insufficiently
set
set horizontal size of picture in
menu IMAGE POSITION of
OSD(see chapter 3.3.2)
LCD shows fine horizontal
stripes
display ("PHASE") is
not correctly adjusted
adjust PHASE in menu BASIC-
SETTINGS of OSD (see chapter
3.3.1)
Touch cannot be calibrated
under the operating
systems of Windows,
button "calibrate" is
deactivated
cable connection
incorrect
check serial connection, restart
computer
Vertical streaks in LCD
image
Display “Clock” or
“Horizontal Position”
improperly set
Set horizontal position and size of
picture in menu “H-Position”and
“Clock” of OSD (see chapter 3.3.2)
Calibrating program states
error when called up
touchscreen driver not
correctly installed
Set the driver again with SETUP or
with button setup in the calibrating
program. Here the serial connection
should be correctly entered and the
correct controller should be
selected. Check the serial cable
connection
6.3 Additional help
If you have problems with the connection and the installation of the Preh Touch / Screen
Commander, please contact your dealer.
You can contact Preh Technical Support at:
Germany /world wide:
Fax: +49 (9771) 92-152
USA/America:
Fax: +1 847-438-4053
(9 pages)
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