Boot up trouble

Touie · 10 Apr 2016 at 18:26

I built a gaming PC 2 years ago and it's been fine since. Then a few days ago it would not boot up, instead it goes into a loop whereby it powers on for a few seconds, then switches off again. Occasionally it will power up for a little longer, enough for me to get into the BIOS, and other times it will look like its about to load Windows, but gets stuck on the Windows loading screen (the spinning circle stops and it freezes completely)
I have tried the following:
Reseated CPU
Tried with just one stick of RAM without the GPU
Reset the BIOS
Tried another motherboard
Tried another PSU
Specs are:
CPU- 4790k
Motherboard- gigabyte gaming 5
(Also tried AS Rock z97 pro 4)
PSU- evga supernova g2 850w
(Also tried corsair cx750)
RAM- 2x Kingston hyperx 2x 4gb
Hard drives - crucial 250gb ssd
And 2tb seagate barracuda
CPU cooler- corsair hydro h105

I'm kind of thinking it may be the CPU but wondered if there is anything else it could be?
Any advice is much appreciated!
Cheers

Danny75 · 10 Apr 2016 at 18:38

Open Disk Management, check that only the boot drive is marked "Boot" and "Active". HDD should only be "Healthy (Primary Partition)".

Try with the stock cooler, to eliminate any over-tight or extra-sensitive mounting.

Take it all apart and rebuild outside of case.

Make sure CPU is at stock (for now) and RAM is @ 1600Mhz.

Touie · 10 Apr 2016 at 18:54

Danny75 said:
Open Disk Management, check that only the boot drive is marked "Boot" and "Active". HDD should only be "Healthy (Primary Partition)".

Try with the stock cooler, to eliminate any over-tight or extra-sensitive mounting.

Take it all apart and rebuild outside of case.

Make sure CPU is at stock (for now) and RAM is @ 1600Mhz.

I was about to start working through these steps and randomly it has booted up. It was looping and then the log in screen came on. Worried that as soon as I turn it off I will be back to square one but I don't know if this helps to diagnose the problem?

itchy · 10 Apr 2016 at 21:54

I get boot loop problems all the time with 2 monitors, if the 2nd monitor shows BIOS splash it will work. If 1st monitor show BIOS it wont boot.

I have to unplug the mains from the back and re-plug it in when I hear the sparky sound it works.

Don't have a clue what it is, I just put it down as quirk of my build.

I have noticed in the past few years MB`s getting a little quirky and have what seems to be a mind of there own. I suppose the more complex they get the more issues arise.