Any TV repair skills here? Clicking noise on the PSU of a Samsung PS50A456P2D

Hi all, to explain quickly and easily I made a video - https://youtu.be/eBrfw383xl8

Basically after looking on youtube, I separately unplugged the Y and X board and still the clicking noise occurs. Does this point to the actual PSU board being the issue?

I can't visibly see any blown our caps, so (I still haven't figured out how to check them), but I think I just want/need to replace a board, but not sure which board yet.. If anyone can assist with that?