I have a JVC projection tv with a blowen fuse and I went to buy a new fuse to replace the old one with and they didnt have the one I needed ( 125 A7 ) so I bought a ( 250 A5 ) and installed it in the tv and it comes on but the picture is all messed up and need to know if it is the fuse because of the new fuse only being a A5?
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Tv might have more dead parts than just the safety fuse.If tv have only a power supply board fuse only they can do it for u wright there take the tv aparts and replace the tv power supply safety fuse like 15 mins job and will cost u like $40 dollars take it to any tvs repair shops.
This sounds serious, I believe that you might have blown a fuse inside the TV set, you could try to replace the fuse but if any other internal components are damaged then you might as well purchase a new TV. Good luck to you!
You have what sounds like a failing vertical output IC also could be some bad capacitors. If you are able to solder it would cost a few dollars to try this and see if it fixes it. If not you would need to replace the whole board itself and that could cost you a little bit more money. If you need a tech it is time to get rid of it you are looking at at least 200 dollars for repair.
How old is this TV?
As Tv's age, the high-voltage suffers and they get darker. You
can turn up the screen adjustment on the flyback transformer and buy
some time but:
My experiance is to not put money into a TV that is over ten years
old. TVs stress out their electronic components worse than almost
any other electronic product. After 10 years, there are so many
parts that are ready to fail that your are probably wasting your money
trying to get any more life out of it.
Another option is to wholesale replace the main board from an outfit like Module Exchange at 972-298-1212
Be careful on buying a new one though. Often times, these new
technology ones are much worse. Always Google the model number of
the set you intend to buy and add the word 'repair' or 'complaint' to
see if it is one of the many models that are customer service
nightmares being produced by even the most reputable companies today.
Hope ya fix it!
I have a similar problem on my CRT computer monitor (AcerView 76c). It is an old screen and I think it is just at the end of its life, much like your TV. Having some background in physics, I would be pretty sure that the problem is with the cathode ray tube's vertical deflection system. The horizontal deflection electrodes are working while the vertical one is not. This results in a display of a single horizontal line (or in my case, a few superimposed) in the centre of the screen. Where both X and Y (horizontal and vertical) deflectors fail then the electron gun firing would result in a single bright spot in the dead-centre of the screen.
So really, we have no choice but to move on and buy a new set as repair is probably just as, if not more, expensive than replacement with a new device. Seeing as your post was in 2007, I hope you managed to solve the problem.