Pc sometimes turn on and somtimes donot turn on

[Sandeepa_2]

i got a really weird problem, something that I've never encountered or heard of before in my many years of building computers. It happens COMPLETELY RANDOMLY, one morning i would wake up and my pc won't turn on, all LEDs on my motherboard are lit and if i even move my mouse the LEDS on the mouse will turn on like normal, but if i press the power button on my case, literally nothing would happen. To temporarily fix it, I unplug my power cable from the powerboard im using (some $70 AUD BELKIN one) and just plug it into a different slot on the same powerboard and JUST doing that would allow my pc to turn on... My pc would be good for a few days even sometimes for a few weeks and all randomly one morning my pc wouldn't turn on again, COMPLETELY RANDOM. When my pc is turned on literally nothing weird happens, I would be able to play a game for 6 hours + and nothing weird would happen. So I don't think its hardware related but i could be wrong, when the pc does boot, it boots up fine no errors whatsoever. My pc specs are as follows:



CPU: i3 6100 STock speeds

RAM: 8gb DDR4 ram 2400MHz (Corsair Vengence)

PSU: 650w (gold certified)

GPU: ASUS GTX 1080

Motherboard: Gigabyte B150m D3H

 

[shmoochie]

It sounds to me like your PSU or mobo has a faulty 5VSB rail and just isn't getting enough power to boot. You can try powering off the computer and then testing the motherboard connector. Also, if you have an extra PSU lying around, I would swap your's out and see if has the same issue.