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Makes loud buzzing sound when first turn on then fads to a low noise after about 5min have disconect all apps turn all of tele still buzzes

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This is a Switchmode transformer, a Choke, "Buzzing" this is happening because something is "Ringing" and causing the windings to vibrate and thus produce an audible signal, this usually happens prior to a unit faulting and is caused by too much current, or the incorrect oscillation frequency, overloading it, and it makes a noise due to it. You need to get this attended to, as it may, fail, and cause a fire or an explosion, or both.

Posted on May 09, 2010

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Posted on Jan 02, 2017

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