I had the click of death issue with my Samsung as well. Tv turned on but clicked off. Slow got worse over a few months.
Took the back of the TV and pulled the power board and didn't notice any bad caps. The board was a BN44-00428B so I did some googling and stumbled
upon 737mechanic post. Turns out it was the same TM801S solder joint that needed more solder. Added solder and the TV turned on with no more clicks, unbelievable!

Kids think I'm a genius lol.. Thanks 737mechanic!!!