Need help troubleshooting

[noxunited]

Hello world,

 

My spec should be at the bottom of this post.

I started getting blue screens whenever i launched a demanding app (games really) In any game, 80fps on ultra for 10-20 seconds, then blue screen.(System_Service_Exception mostly) I first thought that it was the drivers. reinstalled the old ones, still the same. Got through the first test of 3D Mark, blue screen on the second. So GPU seems fine, something else is causing the problem. I tried scanning the PC for viruses with microsoft security essentials, unistalled it, snanned with avast, still nothing. this was unlikely because I don't download any crap of the internet.

Did all windows update, bios updates.. anything you can imagine.

But things got worst: the PC would boot, and i would get "BootMgr not found, please press ctrl alt del. I now had to choose what to boot from everytime,

even though the hard drive was first in boot priorities.

And finally afer 2days of that the PC just doesn't boot. turns on, all fans spinning, just no video output, no beeps, nothing.

So i started testing components: tried powering up another machine with the PSU, it was fine. Tried the RAM in another machine, all 8 gigs were recognized. It was now down to mobo & CPU. tried booting without a cpu, mobo turns on, fans start spinning, then turns off and reboots and the process goes on and on (which I assume is normal if no processor is installed) I then took a i3 2120 or some other Sandy Bridge model, installed it in the mobo, still booted but no video output. I pressed the cmos swtich, tried to boot, no difference.

 

Have I missed anything out? Is it definitely my mobo that is going wrong? I do not have another Z77 board to test the CPU in, but when the pc did'nt boot even with the sandy bridge in, i assumed the problem did not come from the 3570k

No i did not install anything recently, a part from a few steam games.. didn't damage or touch the hardware prior to the blue screen etc

 

Note: i did all the testing with no hard drive plugged in, but it should boot to bios right? 

 

THank you to anyone that can help

[legopc]

 Got through the first test of 3D Mark, blue screen on the second. So GPU seems fine, something else is causing the problem.

no. some things can trigger a blue screens and other things wont do shit. and about your computer not booting up that also sounds like a gpu issue. oh and im not sure but i think you have onboard gpu so try taking out you gpu and that connecting you display to the igpu.

oh and for the whole bootmgr thingy that is most likely becaus the bootfiles are on another disk then your main drive and you most likely have switched cables around or something and now the locations of the drives have changed or its just an update or something else that messed it up 

[noxunited]

thanks for your reply,

I only have one drive so i don't see how bootmgr could get messed up

And I did all the testing with the GPU out, connecting via vga to my monitor, so i really don't know

[legopc]

thanks for your reply,

I only have one drive so i don't see how bootmgr could get messed up

And I did all the testing with the GPU out, connecting via vga to my monitor, so i really don't know

ok then try taking out the memory and see what it does 

[noxunited]

ok then try taking out the memory and see what it does 

I tested the Ram modules on another computer, works fine

[legopc]

I tested the Ram modules on another computer, works fine

no no just take out the ram and boot the thing up and tell me what it does 

[noxunited]

no no just take out the ram and boot the thing up and tell me what it does 

turns on, no video output, fans spinning, then after 5-10 secs stops and starts again. this seems to be happening inifinitely

[legopc]

turns on, no video output, fans spinning, then after 5-10 secs stops and starts again. this seems to be happening inifinitely

ok that sounds good to me (it means the mobo isnt just dead) now try disconnecting EVERYTHING from mobo apart from psu so you are left with mobo+cpu+cooler+mem+psu so no case no other cables just those things and then see what it does 

[noxunited]

ok that sounds good to me (it means the mobo isnt just dead) now try disconnecting EVERYTHING from mobo apart from psu so you are left with mobo+cpu+cooler+mem+psu so no case no other cables just those things and then see what it does 

everything was more or less all ready unplugged but here's what happens:

powers on, no video output. CPU power phase LEDs are stable, fans spinning

[legopc]

everything was more or less all ready unplugged but here's what happens:

powers on, no video output. CPU power phase LEDs are stable, fans spinning

have you tried taking out cmos battery? 

[noxunited]

have you tried taking out cmos battery? 

Yes, no effect whatsoever, also tried to hit the cmos switch, no effect

[legopc]

Yes, no effect whatsoever, also tried to hit the cmos switch, no effect

ok ehm i cant realy think of anything else other then feeling if the cpu even warms up by taking the cooler of and turning it on 

[noxunited]

ok ehm i cant realy think of anything else other then feeling if the cpu even warms up by taking the cooler of and turning it on 

Yes, CPU is outputting heat

[legopc]

Yes, CPU is outputting heat

im not a 100% sure but i think you mobo might be dead or maybe the psu is broken in some wierd way  

[noxunited]

im not a 100% sure but i think you mobo might be dead or maybe the psu is broken in some wierd way  

I'm sending my mobo back for repair, and tried PSU on deifferent PC it powered on fine, used the computer for 30 mins no problem