Hello,
I'm hoping to get some help figuring out how to troubleshoot this power supply board. The television is a Samsung UN75J6300AFXZA, version no. UH03. The power supply board has two model numbers on it, L75S1 and BN44-00723C. As far as experience level, I'm familiar with recapping boards in terms of safely going through the soldering motions, choosing suitable replacement parts, and so forth, but as far as understanding the various functions of each part of these TV power supply boards, I am a rank beginner.
When I plug the TV in, the screen flashes on and off and...