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Chapter
9
Technical Information and Help
9
Maintenance
Careful and regular cleaning can prolong the life of your TV.
Be sure to press the
mains cable from the mains socket before any cleaning.
1. Use a soft dry cloth to wipe away the dust from the screen and surfaces.
2. If the surfaces are extremely dirty, clean the TV with a damp cloth.
3. Ensure there is no excess water on the screen. Allow any water or dampness to
evaporate before switching the TV on.
Never use alcohol, benzine, paint-thinner, cleaning fluid or other chemicals.
Do not use compressed air to remove dust.
Hints and Tips
The following table contains various hints and tips to get the best performance from your TV. If you require additional assistance
please call our Call Centre on (UK) 0344 561 1234 or (Ireland) 1 890 818575. Our Customer Contact Centre is open 24/7.
The TV does not operate properly.
The TV does not respond when
pressing any buttons
TV cannot be switched on
The remote control does not work
Power is suddenly turned off
The video function does not work.
No Picture & No Sound
Picture appears slowly after
switching on
No or poor colour or poor picture
Horizontal / Vertical bar or picture
shaking
Poor reception on some channels
Lines or streaks in pictures
No pictures when connecting HDMI
Picture appears in wrong ratio
LT-39C770_IB.indd 51
button on the remote control and disconnect the
• The TV may freeze up during use. Switch the TV off at the mains for a few minutes.
Switch on again and try to operate it again as usual.
• Check that the TV is connected to the mains supply and switched on.
• Make sure all connected AV devices are switched off before switching on your TV.
• Check to see if there are any objects between the TV and the remote control
causing an obstruction. Ensure that you are pointing the remote control directly at
the TV.
• Ensure that the batteries are installed with the correct polarity (+ to +, - to -).
• Install new batteries.
• Check the TV has power to it. The mains supply maybe interrupted.
• Check if the sleep timer is set.
• Check whether the Auto Standby is activated.
• Check whether the TV is switched on.
• Try another channel. The problem may be caused by the broadcaster.
• This is normal, the image is muted during the TV startup process. Please contact
your service centre, if the picture has not appeared after five minutes.
• Adjust the settings in the PICTURE menu.
• Try another channel. The problem may be caused by the broadcaster.
• Check if the video cables are connected properly.
• Check for local interference such as an electrical appliance or power tool.
• Station or cable channel may be experiencing problems, tune to another station.
• Station signal is weak, reposition the aerial for better reception.
• Check for sources of possible interference.
• Check aerial (Change the position of the aerial.)
• Check if the input source is HDMI 1, 2 or 3.
• Adjust the Aspect Ratio. Press the
(ASPECT) button on the remote control.
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