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ST423E SYMPHONIC 23 TV 2.1

Hello

my tv is dead and i just hear whistles for about couple sec.

please help

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Set is shutting down. most likely in high voltage circuit feeding back to the power on rely.

Posted on Nov 02, 2008

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Posted on Jan 02, 2017

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The "whistle " you're hearing is the power supply indicating that it has a short on its load. When the power supply has an over load (short) its frequency drops down when your ear can hear it oscillating. This type of power supply is a switching power supply normally operating a several thousand hz(cycles) which is out of range of human hearing.

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