BenQ IL5501 55" SmInteractive Signage Display - Manual (Page 72)

Troubleshooting 72
Remote control failure • Check whether there are other objects between remote
control and television remote control receiving window,
thus leading to failure of remote control.
• Check whether the battery electrode in the remote
control is correct.
• Check whether remote control needs to replace battery.
Machine automatically
shutdown
• Whether set sleep or not.
• Check whether there is sudden power outage.
• Check whether there is no signal automatic shutdown.
Signal out of range • Check whether display is set correctly.
• Check whether resolution is the best resolution.
• Adjust line and field synchronization in menu.
Background has vertical
lines or streaks
• Select automatic correction in menu.
• Adjust clock and phase position in menu.
Image lack of color, color
is incorrect
• Check whether VGA is not well connected or has quality
problem.
• Adjust chromaticity and brightness or contrast in menu.
Display format that is not
supported.
• Select automatic correction in menu.
• Adjust clock and phase position in menu.
Touch function invalid • Check whether touch driver is installed and started.
• Check whether the size of article touched is comparable
with finger.
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.
Problem Solution