PSU failure(most likely) after shutdown.

[DefiniteSBC]

I shut down my PC for a day and now it won't turn on. I tried to discharge it by holding the power button for 30 secs, it did not work, I also tried to disconnect and reconnect the PSU from the motherboard, it also did not work, I also tried cleaning the whole thing, it also did not work. I searched solutions online but I still haven't found anything yet.

This sorta happened before but I left the PC in the same state for a day, and it worked fine the following day. Another instance, I tried to discharge it for 30 secs, and that worked before.

After searching for solutions online, I'm a bit convinced that my PSU died on me BUT, I'm still searching for other solutions before I buy a new PSU.

Unfortunately, I can't post the full spec of my PC because I don't have the list anymore but I still have some of the boxes and I'm kinda trying to remember some of it.

Windows 10 64bit

ASUS H110M-D
NVIDIA GeForce 1050ti ZOTAC
Seasonic S12II Bronze 620w

It's a 1 and a half old PC, custom built.

 

[n0ns3ns3]

it is very unlikely for this PSU to die. especially with the parts you listed as they consume very little power.
A very simple way to test PSU is to short the grin wire with any black wire on 24pin connector - the fan in the PSU should turn on.
Is there any led on the MB that is on ?
Anyway, i'd bet that it's the MB.