I'm working on the same problem with a 53XBR200. I think the failure is in the BR board. PIP video is routed through the BM board and full-screen video gets routed and upscaled through the BR board. Whenever video is displayed in any of the PIP modes, the video looks fine. When you go back to full-screen, static appears with every input and ant. I've tried routing video by bypassing the BR board, but this doesn't fix the video. I think the video processor which receives video from either the BM or BR board is expecting 480p. Since the BR board is no longer available from Sony, the only way of making the set useful is to find a way to bypass the BR board, or repair the BR board itself. Has anyone else encountered and/or solve this problem?
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Re: FUZZY (SNOWY) PICTURE
When you say you have tried all the inputs you are not clear if you mean tuner, vcr, dvd, aux, etc. If you are talking about only the cable input it sounds like you have a bad tuner. To obtain picture in picture there are 2 tuners in your set. This would explain why the small picture is ok while the main picture is bad. You should be able to swap the signals (see your ops manual). Try this. If the snow moves the one tuner is bad. If you have put other signals in (besides cable)such as dvd then the problem is in the matrix circuitry where the two signals merge. Either problem should be easy for a good tech to solve and not cost a whole lot.
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Fuzzy is a funny word. I never use it to describe a picture problem. That because fuzzy can go too many different ways. There is snowy fuzzy, blurry fuzzy, grainy fuzzy, and demodulated fuzzy. If the set goes out of focus intermittently that has something to do with the focus ciruitry. If it goes grainy that is a front end problem, usually tuner related. The other types of fuzzy are generally associated with problems in video processing some where. So, which is it?
Oh, and BTW that unit has three small picture tubes in it, one red, one blue, and one green. It doesn't have a 'bulb'.
Sounds like an electronics problem. Try resetting in the setup window. Remove and replace the battery. If these don't work, definitely take it back to the supplier for warrantee repair. Any problems with that, go straight to Consumer Affairs.
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?