the wine cooler has 2 power boards (exactly the same) one for top compartment (running 2 fans and 2 peltiers) and one for the bottom cpompartment (1 fan & one peltier) this board is runnin the bottom compartment and lights and temp gauge, with the back off, the fan is trying to turn, but failing, you can hear a clicking from the board, and the light is flicking in time with the clicking.
If i swap out the fan into the other power board, it works fine, take power from the board, the lights go out, the fan stops (and i assume the pelteier too)
If I am reading this correctly, you have 2 identical PSU boards. One is working, the other isn't. So, you have one known good set of components on one of the boards available for comparative basic component resistance checks including diode/semiconductor junction networks. This may give you a clue to where the problem is, but it also means that you have a source of identical parts for test substitution, if you are handy with a soldering iron.
As already mentioned, the most likely suspect is capacitors, particularly the two on the top right. They look alright but it's difficult to tell from the photo.
I only know two ways to check capacitors in switch mode PSUs. One way is substitution (from the known good PSU, or a new replacement).
Unfortunately, that will be time consuming with the number of caps on the PCB, unless you get lucky.
The other way is to use an equivalent series resistance (ESR) tester, or a multimeter with that function. Ordinary capacitance "value" testers aren't much use.
An ESR tester can be used in situ (usually without the need for removal) and will reveal suspect caps immediately.
Also check the PCB soldering for dry joints, particularly on any components that get hot.
TBH my experience with switch mode supplies in general, is to swap the caps. If that doesn't work, and there is no obvious evidence of other component failure, scrap it.
Like many things these days, repair is not likely to be cost effective, even if you can identify and source replacement components.
If you don't get anywhere, and can't get another PSU at a reasonable price, I have an ESR tester and can easily check/replace the PSU caps if you post it to me.