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Ur high voltage is dead,it the FBT,the flyback transformer,the big black block of plastic with a red wire with a cap go to the CRT(tv tube).It have a paper
clip like '5 steel to the block high voltage go throught
that where the high pitch came from.
Try changing refresh frequency, color depth or resolution (wait for the whistle to appear before testing). Admittedly, you might have to give up some image quality - less colors, or less resolution. There is probably a problem in the TV syncing mechanism - if you can, try getting it replaced. "High pitched whistles" in video and TV hardware are usually harbingers of bad news.
Hi,
Symptom shows high pitch sound is of color wheel that is not spinning any more so TV stay in protection mode and does not power up.
TV requires color wheel replacement.
One thing that comes to mind when you say high pitched sound is the HOT ( Horizontal Output Transistor). You may be able to find one at fry's electronics. They are pretty cheap. If you are handy and know something about electronics you may be able to replace it. I am not a TV tech, I have a background in electronics and like to play with them from time to time. Not sure this will help but good luck
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