PC turns on and off repeatedly

ab2240

Commendable
Jan 8, 2017
3
0
1,510
When I try to turn on my PC, it shuts down after about 3 seconds, then turns back on after another 3 seconds and repeats the cycle continuously.

Yesterday, upgraded my GPU from a 970 to a 1070, but the problem didn't occur until later that day, after I had installed all the drivers and restarted a few times.

The first time this happened, I stopped the loop by shutting it off via PSU. I waited for a few minutes before trying again. This time, it booted up normally.

This morning I woke up and my PC was on, but unresponsive and outputing no video, so I had to shut it down. When I tried to boot it up again, I got the same loop. I haven't been able to fix it so far.

My specs:
i5-4690K
Corsair H100i v2
Gigabyte GA-Z97X-UD3H-BK
Corsair vengeance DDR3 1600 2x4gb
MSI GTX 1070 Gaming X 8gb
EVGA supernova 850 G2

I have tried booting without the GPU, but I still get stuck in the loop.

I can't get any video and I can't get to the BIOS.
 

Garrett_39

Commendable
Dec 12, 2016
27
0
1,530
best way to check is to unplug everything unneccesary. Take out the GPU, only use 1 stick of memory, unplug all non boot hard drives, and all optical drives, and see if it boots. If so then slow start pluging things back in to see what might be the issue. If you still have the issue also try reseating your CPU (take it out of socket, put it back in)
 

ab2240

Commendable
Jan 8, 2017
3
0
1,510
I only have the motherboard, CPU, and boot drive, but it still doesn't work. I haven't touched the CPU since replaced the cooler a year ago. Should I still try reseating it?