AS I WAS WATCHING MY TV,I REALISED THAT THE PICTURE SUDDENLY SHRUNK FROM BELOW AND ABOVE.
I ALSO REALISED THAT THE COLOUR IS DISTORTED.I HAVE TRIED ALL MEANS POSSIBLE BUT TO NO AVAIL.I HAVE REPROGRAMMED,GONE TO THE PICTURE SETTINGS AND TURNED ON AND OFF THE TV BUT NO LUCK.
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The Video (Picture) is SEPERATE from the Audio component of the TV. One can work when the other has gone south. From what I see, the Audio controller board may have been damaged somehow and needs to be replaced. Contact a serviceman for details.
Back-light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/
That could be the Z board, but most likely the sustain and upper/lower buffer boards. The brightness is found in the Z board. Try to find a repair shop to repair on the component level because the cost of new boards out weighs the cost of replacement.
make sure your hd cable connection from your cable box is going to an hd connection to your tv.[via hdmi, dvi,or componant.] if you have a different hook up such as rca out or coax out, these are not hd connections and you are probably streching out the picture.look at the rear of the tv & cable box and see how the connections are.the hd hook up to the hd input should make the picture the right size only if it's set on the hd input channel.hook up the dvd player to a aux/line in or video/source input and try changing the picture size. you may have to play around with it till you get it the way you want.
hope this helps.
My LG tv has suddenly got a problem with the picture. Whilst watching the tv with no problems at all,
the picture was suddenly reduced to a thin vertical line down the centre of the screen
and an awful smell seemed to come from the tv
There is a short ckt in your tv in horl. section.
1 isolate power from horizontal section.
2 check for normal output from power supply.
3 check parts in horl output section
a hor.output transistor
b diode & cap in h/output trnsformerckt.
c check for print.
d if all are ok check for eht transformer.
e if every thing becomes then reconnect hor output section supply.
f put on the set.