Re: Samsung PN51D550C1F died, won't turn on, clicking

Found the problem, one if the driver chip on the y buffer blown causing the VA VS to 0 in the power supply. I isolate the ribbon cable from the logic board. Now with just the PS, Logic and Main board connected got the Voltage right and normal pulse on the Logic board. My question now is since one if the driver chip is fried on the Y buffer, should the Y sus board fried too? And change also the X sus? The X sus are connected to the Y sus. Thanks

Re: Samsung PN51D550C1F died, won't turn on, clicking

Hot the same problem on same model tv. As of niw no Va ir VS voltage, Y and X biards are disconnected only logic and main board. I have a slow steady pulse on the logic. Is it a bad power supply board? All caps looks fine Im thinking starting to remove the mosfets and test them. Any advice which component to look on the possible bad power supply?