QPC-DC Series USER MANUAL
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touch screen is operating, then the problem may be with the driver software, the
application software, or a conflict with other hardware or software. (The problem may
also be due to incorrect Video Alignment of touch screen).
3.5.4 Hardware
Troubleshooting
The touch screen system hardware troubleshooting may require analysis of the
touch screen, controller, cables, power supply, and the integration process. To start
with the controller would be the best. Use the controller power-on diagnostics that
are displayed when the touch panel utility driver software is loaded to check for
specific faults. Also check whether the controller is transmitting any touch data.
No touch data:
When no touch data is reported, the problem may be the touch screen, controller, or
cabling. If the features of controller power-on or LED do not identify the problem, you
can use individual system components what are available to be instead.
Intermittent touch data:
If the system is reporting touch data at a slow or varying rate, the problem may be
caused by a low signal strength or excessive noise in the system. And when the
touch screen is not touched but it shows the touch data often caused by excessive
system noise.
