Dell S520 Guide D'installation page 16

Troubleshooting
Problem (continued)
If the line drawn is not continuos, broken,
or if you encounter problems with the
Touch function in other areas of the
projected image.
14
Possible Solution (continued)
1 Check for presence of foreign objects on the
whiteboard.
2 Please refer to Part I to execute the Adjust
touch sensor area.
3 If there is halogen lamp near the projector and
whiteboard, light from the halogen lamp may
affect touch performance. If so,
a Turn off the halogen lamp.
b Shielding the halogen lamp light to
whiteboard or camera.
c Reduce Touch Sensitivity in driver. Doing so
may however affect touch performance at
whiteboard corners.