Troubleshooting - BenQ DV3750 User Manual

Troubleshooting

Before calling a service center, attempt the following steps to diagnose the problem.
TV
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
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Symptoms
Ensure the power plug is securely inserted into the receptacle
and wall socket.
• Ensure the display power is ON (Indicated by the green
• Try a different input source to check whether the source is at
• Check for mis-connection of cables or for wrong input
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
• Press the
Try selecting a different aspect ration by pressing the
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
• Reduce the brightness level till the black areas of the picture
• 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
• 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
• Check for any obstacle between the remote control and the
• Check that the remote control sensor window is not under
• Check for any devices (PC or personal digital assistant,
Possible Causes
Power indicator on the front of the unit)
fault.
source.
properly performed.
(Picture mode) button on the remote control
to select a different picture mode.
(Screen aspect ratio) button on the remote control.
somewhere in the external AV equipment.
appear as black.
PC/DVI source signal.
the display's remote control sensor window.
remote control sensor window.
strong fluorescent lighting.
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.
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Troubleshooting 29