I'll second you on that, and justified in my opinion - If people respond to post I'm not concerned 'who' replied before the thread gets viewed, that's a 'name-dropper' aspect spoiler in using it for this user, some folks just like seeing their name in print multiple times I guess.

Capacitors failing? There are whole annual productions worth of PC Mainboards that are known to have capacitors with a very short service life that got assembled and distributed anyway - it's the slippery slope of gambling on warranty repair, profiting on field service or a flat rate rebuild once they've been in extended service. Maybe even pushed as far as weekend junkets or bundle of cash for the specification engineer to get a low quality line of capacitors in production (and out of the factory supply chain).

Took it off the wall and back to the play pen for a better look, the MOSFET bank at the rear looked very gunky so I removed the heatsink to fully expose the control board and MOSFET's.

A prolonged spray with ecectrical cleaner and a blast with air cleaned up most of the gunk. Tried powering it up and no go, bugger again.

Its very wet today and the cleaning spray makes the components cold so moisture soon covered them. So out with the heat gun for a bit of molly codling and it jumped into life.

Re-installed it and the AC voltage was 190 not it's usual 240, grrrrr heat gun again and 240v.

So I put it in service and left the cooling fan O/S overnight to let it warm up.

In the image you can see that the cooling fan blew direct onto the control board.Now the cooling fan was set up to blow and since the relay that starts it was faulty (some time ago) I just ran it full time and as the winter moisture set in, well dust/moisture and electronics don't mix.

So I have fitted a new fan to suck this time and will build a circuit to start it when the inverter is supplying say 1 KW. One can only asume that one of the pots on the control board is voltage adjustment and it got wet or gunk washed into it.

A heat gun or hair dryer will quickly fix a wet one if I need the light. I've never had to replace caps on the circuit before, but cap failure is common, even on high-end hardware. A Taiwanese firm stole what they thought was an advanced electrolyte formula, when in fact it was "experimental" A lot of computers were recalled because of power supply failures when those caps failed.