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Chapter 5 Maintenance and Troubleshooting 31
3M Touch Systems Proprietary Information
Colors of
image are
abnormal
Check that the video cable is connected properly and
securely to the monitor and the computer.
Check that no pins are bent in the video cable connector.
Disturbances
on the screen
The video display adjustments are incorrect. Refer to
Chapter 4 for adjusting procedures.
Troubleshooting the Touch Screen
If you are experiencing problems with the touch screen, check the
following list of common installation errors.
Table 4. Common Touch Screen Installation Issues
Common Installation
Issues
Possible Solutions
Touch screen does not
respond to touch
Review the installation procedures. Are all
cables connected properly?
After you installed TouchWare, did you
restart your PC to activate the touch screen
driver?
Are the communication settings correct? Is
the touch screen trying to use the same COM
port or IRQ as another device (for example, a
mouse)? If so, a hardware device conflict
will result and the touch screen will not work.
Touch screen is not
accurate
Calibrate the touch screen for the current video
resolution and operating system.
Cursor does not follow
finger movement or
does not reach the edges
of the screen
Calibrate the touch screen for the current video
resolution and operating system.
Cursor is not located
directly underneath your
finger
Open the touch screen control panel and
make sure all cursor offsets (vertical,
edge/horizontal) are turned off.
Calibrate the touch screen for the current
video resolution and operating system.
Cursor is extremely
jittery or erratic
Stabilize the cursor by adjusting the operating
frequency of the touch screen controller.
Cursor lags finger Lower the baud rate of the touch screen
controller and the touch screen driver.
31


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