Samsung un50h5203af

[nosaj]

hi all I have a Samsung UN50H5203AF TV when plugged in , the back light just flashes on/off cycling..

I've opened it up no swollen caps
The power supply board number is L50HF_EHS at CNL802 pin1 and pin2 measures 381.7 vDC with the connector unplugged when plugged in the voltage fluctuated from 90v to 110v (black probe at ground by power plug red probe at pin 1 or 2).

Can anyone tell me how to proceed next?

Thanks,
Jason

[nosaj]

Re: Samsung un50h5203af

Ok made a DIY LED tester from here https://www.youtube.com/watch?v=4pK6o2DMLWQ
Found all 4 led strips that connect to plugs were dead . The ones that plug into them some leds out some not.

Jason

[neilc6]

Re: Samsung un50h5203af

I had a UN58H5202 where the backlights flashed. Replaced all the strips with used ones I had but still didn't turn on. Connected panel one side at a time and one side turned on. Had to rip the side tabs off the bad side to get the tv to work.