Hi Alfredomfr1 and R_J. I am a little late to the party on this post, so I'm not sure if anyone will respond, but I thought I would try! I am very much so a novice at troubleshooting Samsung Power Boards. This was a 75” TV that had a good screen, so I really wanted try and fix it. The board is BN44-00621C, but I think it is very similar to the “A” version. When Plugged in, the TV turns on and shows “Samsung smart tv” and then immediately the relay clicks and it turns off. It does this loop forever. If I unplug it, it will suck the voltage from the filter Caps and continue to power cycle...