Question PC turns on for a second then turns back off

[Ble1d]

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I’ve had this PC for about 2.5 years, and I woke up one morning to my PC not turning on . It turns on for about a second and the CPU and GPU fans spin but not the case fans. If I try to turn it on again nothing happens until I switch the power supply off and on and same thing happens. There is power to my motherboard Causes the orange LEDS are on when my motherboard (These lights are on my motherboard came with it )is on. None of the caps seem to be broken.

I’ve took out a ram stick didn’t work. Changed power supply cable didn’t work. Changed the outlet didn’t work.
PLEASE HELP AND THANKS IN ADVANCE

 

[vov4ik_il]

Might be a bad PSU but that is just a guess. Do you have another one to borrow and try?

 

[Ble1d]

Might be a bad PSU but that is just a guess. Do you have another one to borrow and try?

I just ordered on in amazon it’ll be 7 days

 

[ZenKoiDragon]

Hey! So I'm just on here posting about my issue suddenly. Had mine since i built it in 17 jast as the ryzens were released.. Ive since added a second GPU and havent had one issue..
Yesterday, my order arrived .. a new keyboard and i thought a new casefan couldnt hurt.. I get that fan installed... boot it... going about mynormal thing then.... blip. gone.. shut down .. no warning, no blue or black screen... its not frozen... after a few times trying it and trying to get into UEFI to slow fan speed down, I notice the GPU fans slow and stop a little bit before it goes dark... so its a safety feature to shut down if somethin gets too hot... but, Is whatever causing the GPUs to stop which triggers the blackout? or is it like a mobo issue with fan power distribution... its overloaded... the liquid cooler 2 fans, three case fans now, each GPU has two ... and one somewhere by PSU? Well, this both sucks... AND blows you'll have to say whether that new PSU works for you...