why does my tv make a high pitch sound sometimes?

Question

Our tv is about 7 years old...it's one of those 52" big ones and every so often it makes a high pitch sounds. We normally turn it off for a few minutes and then turn it back on.

Answer 1

Your set most likely uses CRT tubes, and those tubes need circuits to generate the high voltages they use. The transformers generating these voltages sometimes vibrate and produce a high-pitched sound. You may be able to find a TV repairman to look into it for a reasonable charge, and sometimes all that is required is tightening up something. Or, the horizontal flyback transformer may have to be replaced. In any case, it is a job for a qualified technician and should not be attempted by anyone else.

Answer 2

in the previous I provide this recommendation, you will possibly desire to settle on in case you experience gentle establishing the set, and working close to extreme voltages. First, in case you agree directly to open the lower back of the set, make specific it truly is on a sturdy floor, the conventional public of the load of the set is interior the front glass of the CRT. the 2d warning is to be truly carefull, exceedingly close to the anode lead, which has a suction cup connector on the precise of the photograph tube, (CRT). employing basically plastic, non conductive approaches, you could commonly press on the offending section. The flyback is the greater effective transformer which has the anode bring about the CRT linked to it. many circumstances, even nevertheless, I even have got here across smaller coils or transformers to be the reason. they commonly have a ferrite middle, which bodily separates from the coil winding. once you hit upon the section inflicting the squeal, you could on occasion treatment it by ability of putting a toothpick, or employing some warm glue, (capability off of direction). remember, the CRT anode nonetheless might have approximately 30,000 volts regardless of the capability plug disconnected. maximum restore shops are respected, and in case you prefer to take the set for restore, tell them a sturdy pal of yours is a television restore tech in yet another city. a minimum of you recognize the main probable reasons. Many will prefer to interchange the priority section on account that additionally they might desire to guarantee the restore, truly somewhat worth the fee.