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The backlight or power supply for it has failed. Use a strong light next to the screen and look for a faint picture. If it is out of warranty, take it to a repair shop.
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I just changed out the invertor boards and mine was fixed. I had the same problem. Im not a TV repair man but replace the board thats buzzing and it will work again.
No Sir,
pixel are come from the screen panel. All LCD TV have these pixel and some do shows and some don't. Also depending quality of the screen panel. (These should be counted panel defective) according the information through the LCD factory.
First check Tv menu comes on screen?
Connect DVD Player at any a-v input and confirm picture on tv. This will confirm that tv has no problem except in tuning circuit.
Now check Antenna / cable hooked up in RF input of tv properly.
Perform Auto-Search / Auto-Tuning / Auto-channel on TV menu and tune all available channels.
Still blue screen? means TV Tuner looks bad.
Astar 30" LTV 3001 ....These TV's have a cooling problem that causes premature electrolytic capacitor failure. De-solder and Test all the 2200uF-25v, 3300uF-35v and 1000uF-10v caps in the power supply (center board, back of TV). Use a good LCR meter that will read 3300uF or better, Replace all bad caps with 105c rated caps. If you don't have an LCR meter, replace all the mentioned caps on the PS. If fuse on board is blown, also replace the F9222L regulator IC chip. Mounting a small cooling fan on rear of TV over the PS will help keep your new caps from failing again. This requires holes in the stand bracket and the rear of the TV, power can be supplied from a 14V source near the bottom of the PS board.
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