Unit is about 1.5 years old, bought on e-bay from established seler in NJ, new in box. last week it began with a picture with mutli-colored lines, vertical and horizonial with some snow that move with the motions of the picture but in random paterns. The picture is just lines and distortion. you cannot tell what you are looking at. sound still works fine. All inputs have this problem from sources known to be ok. Have unplugged the set for 24 hours and same problem. Zenith "technical HA HA support"said because it was purchased on e=bay all warranty is void! Even though this seller has a showroom and is a valid Zenith dealer. What might be wrong with the tv???? Help.
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Re: screen full of moving colored lines
I would suspect bad solder connections allowing a ground to "float" It is a common problem with the model P42W24BX which I believe uses similar circuitry as your model. An experienced repair shop should be able to get you fixed up.
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Similar problem with an eleven and a half month old LT-40148. Approx. 1 inch vertical banding line on left side of screen on all inputs. After about two weeks, same problem on the right side of the screen.
Fortunately this occurred two weeks prior to the one year warranty expiring.
Called Mits customer service and they referred me to an authorized service center who I happened to have dealt with before.
They picked up the set. The front panel (LCD screen ) had to be replaced. Set was gone for two weeks as parts were not in stock. There was no charge. I hope this screen last more than a year.