Ringing sound with fan?

LCD TV Repair Tutorial - LCD TV Parts Overview, Common ...

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Repair review of common LCD TV Problems and Repair Solutions ... input the tv is set to it begins making a high pitched whiningsound. .... I have a LG 47LN5750 that powers on, flashes a good picture for about 1/2 second, then goes dark. ... hi my samsung tvis not turning on is black. and I just replace the ...

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LG 50PK540 plasma TV Repair power supply EAY60968801 Part 1-2 ... Sanyo DP42849 with high pitched squeal after replacing power supply. ... In my second daily fix video, I solve a mystery that was making me having to turn off my speakers before I went to be ... The flash is accompanied by an high pitched sound.

TV not turning on; making high-pitched sounds - Tom's ...

Sounds like a bearing in the electric fan is bad, replace fan motor

This is just a guess but I can think of only two things to check.
Exhaust system has a small leak.?
Or fuel pump is about to fail.?

Some things I would check are do you have blue tooth in operation. Do you have any form of michrophone in the cab as it sounds like a feed back problem coming through your speakers. Talk to a radio techie to see what he thinks

Hi,

Here is a tip that I wrote about refrigerators and the fan noisethat they develop sometimes...

RefrigeratorFan Noise
heatman101

I don't know if this applies in your case but I have had fans with metal blades that would resonate with a high pitched ringing sound. It may also be that a blade is slightly contacting a metalic mesh filter cartridge.

forget the xbox, yo have tintinnus or tinnitus, you need to see a doctor ASAP i had this and it went away on its own but you can have it the rest of your life and there is no cure

were is the fan making the noise if it in the freezer and making noise check for frost eany frost you may have defrost problem if it is in the refrigerator change fan if is the condenser fan change

If the sound is from the compressor, the unit is likely under warranty...generally 5 years.  If the unit is frozen up and the sound is from a fan that is hitting ice, defrost the unit completely.  Other fans in the unit could also be squealing.  You'll have to be a detective.

No transistor will make such noise... The problem is not in your M/B. The problem might be due to the fan that cools your processor. So clean dust around the fan thoroughly.