BenQ RE6503 - Page 74

Troubleshooting
69
Problem Solution
Touch function invalid • Check whether touch driver is installed and started.
• Check whether the size of article touched is comparable
with nger.
Touch positioning not
correct
• Check whether driver is properly installed and make
correction.
• Check whether touch pen is facing the screen.
No picture and no sound • Check whether the machine is started state.
• Check whether signal wire is well plugged, whether INPUT
is corresponding to it.
• If in internal computer mode, check whether internal
computer is started.
With horizontal or
vertical stripes or image
dithering
• Check whether signal wire is well connected.
• Check whether other electronic equipment or power tools
are placed around the machine.
No color, color is weak or
image is weak
• Adjust chromaticity and brightness or contrast in menu.
• Check whether signal wire is well connected.
With image but without
sound
• Check whether mute button is pressed for mute.
• Press VOL+/VOL- to adjust volume.
• Check whether audio line is connected correctly.
Only one speaker has
sound
• Adjust sound balance in menu.
• Check whether computer sound control panel only sets up
one sound channel.
• Check whether audio line is connected correctly.
VGA output without
sound
• Check whether connect external device with headphone
cable.