Troubleshooting - BenQ DV3750 User Manual

Troubleshooting

Before calling a service center, attempt the following steps to diagnose the problem.
TV
Symptoms
Power does not turn ON
There is no picture or sound
There are spots on the screen
Degraded colours or tints
Improper screen position or size
The image appears distorted
The image appears too bright,
and there is a loss of definition
in the brightest areas of the
image.
The image appears too 'washed
out', or the darkest areas of the
image appear too bright.
Power indicator lamp flashes
red.
"Out of range" appears
Remote control does not func-
tion properly
Possible Causes
Ensure the power plug is securely inserted into the receptacle
and wall socket.
• Ensure the display power is ON (Indicated by the green
Power indicator on the front of the unit)
• Try a different input source to check whether the source is at
fault.
• Check for mis-connection of cables or for wrong input
source.
Your TV is being affected by interference from automobiles,
trains, high-voltage transmission lines, neon signs or another
sources of interference. Try redirecting or relocating your
antenna to reduce the affects of the interference.
• Check whether all the picture adjustments have been
properly performed.
• Press the (Picture mode) button on the remote control
to select a different picture mode.
Try selecting a different aspect ration by pressing the
(Screen aspect ratio) button on the remote control.
Ensure the display's aspect ratio is correctly set to suit the
program source.
• Reduce the contrast setting.
• The DVD player is set for a high-level output.
• The AV video signal has not been terminated properly
somewhere in the external AV equipment.
• Reduce the brightness level till the black areas of the picture
appear as black.
• The DVD player may be set at too high a brightness level.
• Check the PC/DVI cable for disconnection.
• This indicates the PC/DVI input has been selected with no
PC/DVI source signal.
• The TV has been placed in PC Standby mode.
• Check whether the input signal is acceptable to the display.
• Check for incorrect battery orientation.
• Check for dead batteries
• Check your distance and angle from the display.
• Check whether remote control is properly being pointed at
the display's remote control sensor window.
• Check for any obstacle between the remote control and the
remote control sensor window.
• Check that the remote control sensor window is not under
strong fluorescent lighting.
• Check for any devices (PC or personal digital assistant,
PDA) nearby that transmit infrared signal which may cause
interference to signal transmission between the remote
control and the LCD display. Turn off the infrared function
of these devices.
/
Troubleshooting 29