Please don't give up on this TV! I mentioned in the other thread that I'm working on one with a near identical issue (also a Samsung from '09, this one is a much thicker, 55", without the low profile cuts in the board, etc). I found bad Sam Young filter caps on the supply board and until I watched your videos was sure that those were the problem (replacements arrive today... I'll know tonight!). If it's not those caps I'm not sure where I'll go next for the repair ugh!