Benq DV3750 Manuel D’Utilisation

Troubleshooting

30

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Antenna

There is no picture or sound, 

just noise.

• Make sure the antenna cable is properly connected.
• Change channels to confirm if the symptom is still present.

Picture is not clear.

• Make sure the antenna cable is properly connected.
• Change channels to confirm if the symptom is still present.
• If PC is selected as the input signal source, use the Auto 

function in the PC Menu to let the TV adjust picture auto-

matically.

No sound.

• Check whether you have selected Mute for Audio setting.
• Make sure the volume is not set to minimum.
• Check the AV cables for disconnection.

Symptoms

Possible Causes

The picture is not sharp or the 

picture moves contains image 

movement.

• The reception may be weak.
• Change channels to confirm if the symptom is still present.
• Make sure the outside antenna is not disconnected.
• Make sure the antenna is facing the right direction.

The picture is doubled or tripled.

• Make sure the antenna is facing the right direction.
• Picture ghosting is caused by reflections from buildings, 

large metal structures and mountains. Carefully realign 

your antenna to minimise the ghost images. Ultimately a 

higher quality antenna professionally installed may be 

necessary to reduce the ghosting.

The picture is spotted.

• There may be interference from automobiles, trains, high 

voltage lines, neon lights, etc.

• There may be interference between the antenna cable and 

power cable. Try positioning them further apart.

There are stripes on the screen or 

colours fade.

• Is the display receiving interference from other devices? 

Transmission antennas of radio broadcasting stations and 

transmission antennas of amateur radios and cellular 

phones may also cause interference.

• Use the display as far away as possible from devices that 

may cause possible interference.