HELP PC turns on then off after a few seconds

[renold458]

Hey guys, I really need help. I shut down my system a few hours ago and came back to turn it on to have it shut off a few seconds later. The sound you hear that rises up to a chirp doesnt have the chirp, it just shuts off where you'd usually hear that part. At first I thought it was a video issue through HDMI as my TV is sometimes finicky and won't show the PC display. I checked and noticed the PC was shutting off and turning back on and off again, essentially a loop. The PC I built myself and has been running fine for months. The specs are as follows:

Core i5 4670K
EVGA Geforce GTX 770 2GB
8 GB Kingston HyperX RAM 1600 MHz
Seasonic G Series 650 WATT PSU
Gigabyte GA-H81M-HD3 Motherboard

Nothing has been overclocked and the BIOS untampered with. Please help!

 

[drtweak]

Try this. Unplug the computer from the Power Outlet (or unplug the power cable from the back of the PC)

Hold power button down for 15-30 seconds then let it sit for 5 minutes or so. Then plug it back in and see if it boots up

 

[renold458]

It worked! That's odd that it did this time as I've tried that before, maybe it's because I didn't leave it alone for 5 min after, I tried booting it right away after holding the power button. Any ideas what may have caused the loop?

 

[drtweak]

Yea gotta give it some time even after holding the power button. Some PC's will be ok after the 15-30 seconds but some you gotta give a few minutes