Computer screen goes black, but power is still running


Mar 4, 2017
So recently my monitors have been be going black spontenusally with the display saying "no signal detected" when I'm using the computer, but when this happens my keyboard, mouse (I use a censor mouse and even the censor stops picking up movement) and even my power button itself dosent work. I try to hold down the power button to force shut down but it won't turn off, the only way to turn off my computer in this state, is at the mains.

Now when I turn on my computer, it boots up as normal, but after like 5 to 10 minutes of using the computer it goes black again and just becomes a vicious cycle of the same thing (I have to even post this from my tablet as my computer can't even stay alive to post this issue).

I'm not sure if this is a motherboard, PSU, CPU or GPU issue, to even attempt to replace one of them to find out.

I was thinking it could be the PSU (maybe?) but then the other stuff stops working like keyboard etc. So it led me to think it could be a motherboard problem?

A solution to this would be much appreciated!


amd fx-4100 quad core CPU
Palit geforce gtx650 2gb ti nvidia GPU
Asus M5A78L-M/USB3 motherboard
Corsair tx750 80-plus power supply
16gb ram Corsair vengeance