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Having same problem. Smacking it or applying pressure often works. Extremely annoying (inconvenient) that a nearly $1000 machine breaks down very soon after one year ( how long the warranty is, of course)
It sounds like a problem called blooming, or you are having a problem with focus control which are signs of a problem in the horizontal and high voltage section of the tv in the case of plasma TV this would be the excitation circuit. I would suggest that you take the set to a TV repair shop to effect repairs.
I assume that you are dissatisfied with the quality of the picture on
the HDTV. Are you feeding it with an HD signal. First, it
must be an HD source, either over the air HD or a cable channel in HD
(not all "digital" signals are HD signals). Second, you must be
sending it with the proper cable, either HDMI or at the very least RGB
Component Cables (not composit video).
It is quite common to see standard definition on HDTV's actually look
worse than on standard def sets. The reason is the extra pixles
availble on the HDTV make you realize how low of resolution the
standard def signal is. Instead of it just being fuzzy or
unclear, it will actually look bad.
it is important to understand the difference in digital cable and high def. high definision is on a fiber optic display alwing milions of pixels per square inch on your tv. the resolution effects your fuzzy picture you are recieving . the only real way to fix that fuzzy dull picture is to get a HD box from your cable provider and an HDMI cable to conect it to your HD TV. this is the only connection you will need for picture and top line sound. In the end the fee is usually $9.95 or less a month and it is well worth the difference in quality of TV viewing.
There is quite a lot you can do. Go to menu, picture settings and select user 1. From here you can adjust everything from colour to contrast to warmth to sharpness. The best thing to do is to swith to XD manual adjustment and make sure the mpeg noise reduction is set to max. This removes artifacts and gives a better picture. Oddly, connecting via SCART rather than HDMI will give a more watchable picture if the HD broadcast is't at a very high bit-rate. I hope that helps :o)
Well, I can tell you it shouldnt have anything to do with your not having an HD box. The TV does not require a HD signal to give you a quality picture. The HD box only gives you the enhanced HD signal, but should work as any regular TV without it. How do you have it connected?