Question PC cuts out and won't turn back on again unless particular conditions are satisfied

Kefka353

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Jul 18, 2017
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PC power cuts out and won't turn on again unless the power cable is pulled out of the socket and left for 30 mins or so. Then upon plugging in, the PC can be used. This started about a month ago- just after the parts warranty on my PC ran out (I have a Blackfire Shaman from FiercePC).

The PC tends to do this in two situations:

1: Always when powered off, won't turn back on again unless disconnected from the power socket for a while, then plugged back in.
2: When placed into sleep mode for an extended period of time.

When neither of these criteria occur, the PC has been able to be on for 3 days in a row without cutting out sometimes, including playing games such as League of Legends etc on it.

Upon plugging back in, I see a flash of light inside my PC for half a second or so and then my PC will power on if I press the power switch.

Very rarely (including today), it has cut out whilst I have been actively using the PC. I was playing a game and my PS4 controller plugged into a USB port stopped working, as did the keyboard and mouse. About a minute after, the PC power fully cut out.

The PC isn't blowing fuses, after this occurs I can use the same power cable with the same fuse.

I can also confirm I have tried with two different power cables and the situation is the same.

Can anyone help me? I've endured this for over a month now and I need to resolve this.

Thanks!
 
Yeah, seems very plausible. However I do not have a spare power supply to test so I'd have to go out and buy one to test, so I need to have a high degree of confidence this is the case.
I have enough confidence where if it were me I'd have bought the supply...although I can't be 100% confident...but I've seen this enough....and a new supply has fixed it for me every time as far as I can recall.
 

Kefka353

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Jul 18, 2017
6
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4,510
I bought a new power supply, same wattage. Couldn't boot with it. I breadboarded it and still couldn't boot with it. I kept it in the breadboarded state and put the old power supply in and can boot with that but still the same issues. I can't get my CPU fan to even work or an LED to light up on the motherboard with my new PSU. New PSU is a Corsaie TX750M, and my old one is a Cooler Master 750.