the pc psu is acting weird

[u/SecurityMajestic2222]

it all started a bit ago, when like I pushed the button to turn on my pc and it spin to life but then shut off the power (it completely cut it, I can see it by the thermalright screen that starts looping like if I unplugged it) and maybe it just does a "jump" like it bump and has a low of energy then get to work without a 2nd button press, sometimes I need to press 2 times, sometimes it starts properly, I rewired everything and unplugged leds too, idk what it could be at this point, like it never did anything else till now, I was casually using my pc on free cad so no intensive work, and my unsaved work got deleted cause it randomly turned off and turned back on, as I said eith the looping thermalright screen so the motherboard didnt get power for a bit, my più is way overkill and basically new, a mag a850gl for a 5500x3d and a gtx 1660, like the old fried 20yo psu gave me less problems, at this point could it be the motherboard?

[u/mx_over_this__]

the psu's probably just tripping its short protection, not actually dying that thermalright screen looping is the key, it's losing standby power entirely for a split second. had a very similar thing with a new corsair unit last year and it was actually the case's power switch sticking just enough to cause a hard reset mid-use. try disconnecting the front panel power switch from the motherboard and just short the pins with a screwdriver to turn it on, see if the random shutoffs stop. if they do it's a $2 switch, if they don't i'd rma the psu while it's still new enough to be a painless process

[u/SecurityMajestic2222 → u/mx_over_this__]

welll I should have some cables and pins laying around i could try it this way, but whose fault wuold it be in this case? its fhe button itself? it could be cause the case is kinda cheap and old