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Grainy picture after my grandmother had the remote...Please help! Something needs to be re-set.

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Try adjusting the picture and sharpnesss controls see if that helps.

Posted on Jun 15, 2008

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Can i optimize my grainy picture on my Hitachi projection tv


Unfortunately, without me seeing it I can't tell all what you will need to put it back into optimum performance. Older projection sets are pron-ed to having the coolant replaced for the 3 picture tubes. I don't know the quality of the tubes themselves, so it's really tough to make a call on your set. If it's just fluid, I would say you would invest $300.-400. in work. I don't believe it's worth putting that much into it if that's what it needs. Of coarse this is only if you have a projection set, you didn't state what model of set so I'm assuming it is one. Hope this helps......

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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'.

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1 Answer

Grainy picture


Hi and welcome to FixYa,

Initially, some ideas you may want to try/consider:
  • other than the TV, all switched off and unplug. Try evaluating the reception of any/all TV channels;
  • if quality is bad, either the tuner (least likely) is bad or a problem with your cable system/provider;
  • if the quality is good, then either the DVD or the game console has an RF modulator that interferes with the Toshiba's reception;
  • if the grainy picture is when using the Audio/Video inputs, then it would not be the tuner but rather the video processor;
  • should the tuner really require replacement, it would be relatively easy since it is a single block/assembly with a couple of pins and a mini coaxial connector;
  • best approach would be to reference a Service Manual. Pls bear in mind that voltage check requires the unit to be powered on and therefore exposes you to potential electrical hazard.
Check and perform preliminary visual or necessary inspection. Pls post back result(s). Good luck and Thank you for using FixYa.

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I HAVE 52" RCA TELEVISION.MY GRANDSONS WERE WATCHING IT USING REMOTE CONTROL.THEY DID SOMETHING;WHICH HAS CAUSED THE SCREEN TO SHRINK.PICTURE NOW HAS APPROX. 4" TO 6" ON ALL...


Can you please give us the exact model of this TV set so we can help you better..by the way did you try resetting the settings of your TV using the remote I believe there's an option there to reset the settings of the TV set....

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There may be some problem with your picture tube else try this that looks like retrace lines. Anyway, you should try to adjust screen pot not focus pot. Make sure you are turning blue screen pot (there are 3 focus pots and 3 screen pots) and do it slowly. If you turn it too much, it will affect your grayscale

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I will need your model number of your television in order to help you locate the remote and owner manual. Please post the info and I should be able to help you out with your request.

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1 Answer

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Try playing a DVD movie on the tv if you still get the same bad image your pretty sure that its a tv problem an you should get a hold of the manufacturer and let them know and see what they will do for you.. If the image has cleared up then it is a good bet that it is a signal problem. Good Luck !

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The picture tubes are weak or there is a problem in the power supply. you may not see a bad capacitor as all caps do not swell or leak when they go bad, If you have no TV experience, A TV set is not a place to experiment with.

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