Question about RCA HD52W58 52" TV

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The green power status light will come on, but the screen will remain black, There is a buzzing sound coming from the back, it sounds like it's coming from the smps transformer not the flyback transformer, no capacitors seem to be blown or resistors burnt. any solutions to this?

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The buzzing comes from the transformer of the power source - it's overstressed by a short. To find out which part is shorted you must check the voltages on the output lines from the source - the voltage on the one powering the faulty part will be way lower than normal. Follow that line and test every single component until you find it. But on your tv the first thing i would test is the horizontal deflection power transistor - the one that powers the flyback.

Posted on Nov 06, 2010

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