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Re: High Squealing Sound
There is a stand up coil about 1" tall and the dia of a nickel close to the HV transformer, the iron core glue comes loose over usage. This can be cured by replacing it or using a sealer/caulk and re-seal the coil. Hope this helps, it is not an expensive job for service.
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One of most two common reason why your set will not come on, is because it has lost the high voltage, the first thing to check is your horizontal output transistor, to see if it is shorted, it will be located bay the flyback, mounted on a metal heat sink. That is what is causing a squealing noise.
Sounds like the color wheel. It's the only moving part in most DLP's and the bearings can go bad. If it manages to get up to speed the picture may look normal. One temporary solution may be to let it run a few minutes, then turn the set off for 10 minutes, then turn back on. When my color wheel was going bad that would often quieten it down. For the rest of the day, try to leave the set on, especially if you're only going to be away from the TV for short periods. You can turn off your cable or satellite box but leave the set on and you won't have to go through the hassle of trying to quieten down the color wheel until the next cold start. Of course the best solution is to replace the color wheel which even with a rebuilt unit won't be cheap if your warranty is expired.
my d52w19 chassis itc222 as posted most of the time wont turn on and the green light flashes three times every time it makes a small noise. sometimes it does turn on and you hear a little pop and the tv fires up. latley there is a really high pitch noise that will slightly change pitch if you move the tv or put slight pressure on the top or botttom rear part of the chassis. thanks for the help as I have seen that this has been posted before without mention of the high pitch noise.