Sorry if this is a bit of a novice question...

I have a SMPS in Plsama tv which upon powering up starts clicking... It
seems to do it as it warms up or the load changes on the psu (screen going
dark or getting light)

As far as I can tell it isnt any relay doing this, even though It sounds
like a relay.

Ticking alone I could live with, although a bit annoying but the PSU also
occasionally shuts down when cold. I am not 100% sure what is clicking.. The
clicking noise seems to be coming from different locations at dfferent
times, even possibly the X or Y sus boards.

I have sprayed the whole thing down with freeze spray to no avail... It is
built with PBF solder, so I guess bad solder joints are likely issue also.

I have changed the obvious capacitors near heat sources excpet the two large
400v 250uf filter caps.. Removed and checked the filter caps and they
checked good on my ESR meter.

Any Idea what would be clikcing? Here is the board layout
https://sites.google.com/site/chibamikey/PSU.JPG