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LOT [Line Output Transformer] fault. Check the horizontal scan output transistor too. If it is damaged, this kind of fault can occur. Anyway, the fault is related to its horizontal scan output section circuit. Check it. To get more details, http://electronicshelponline.blogspot.com/
This set has a shorted horizontal output transistor and possibly a bad high voltage transformer. If you repair the set, also solder the horizontal drive for the transistor listed above. Try www.encompassparts.com for parts. the h-ouput transistor is p/n: 223942 and the transformer is 223952 .Thanks and good luck.
Does the squeal come from the TV cabinet or the speaker? If from the cabinet , it's most likely the Horizontal high-voltage section of the set. Find someone that's good with hand tools,unplug the set from the wall outlet, let it sit for a good 30 minutes. have someone open up the back of the set and dust out and vacuum out any dust from inside the set. Put back together and try it out.
jdosk-the high pitch noise you hear is generally from the horizontal output being shorted,the horizontal output is usually near the flyback transformer,get a digital multimeter to checkthis part.Let me know I'll try to help. cooltek Feb.16/08
The high pitched sound is probably comming from the power supply, possibly due to its trying to drive voltage into a shorted component in the high voltage deflection circuits. You may be lookng at about a $250 repair. If it has been used a lot and its picture quality didn't knock your socks off, I would replace it with a HDTV set. A 37 inch LCD from Toshiba might be a good place to start and should do nicely for you.