hey guys i have a Sony 15" monitor with built in speakers and mic.  Lately, ever
y now and then it starts to make this high pitched squeeling noise..NOT out of t
he speakers, but internally somewhere.  If i unplug or press the mute button on
the speakers, the sound still continues, and it doesnt sound like its comming fr
om the speakers.  The microphone is NOT CONNected so its not from that either...
 any ideas?

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