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System won't POST, endlessly reboots

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September 18, 2012 11:16:37 AM

I've just installed a new motherboard and now when I power on my system it doesn't even POST, it just turns on for a few seconds then endlessly reboots. It doesn't stay on long enough for the debug LED panel to show anything. I can't figure out what's wrong, I've tried all of these steps: http://www.tomshardware.co.uk/forum/261145-13-perform-s....

Motherboard: MSI Z77A-GD65
CPU: i7 2600k Sandybridge
RAM: 4x4GB Corsair Vengeance
Video cards: 2x Zotac GTX560Ti "448"
PSU: OCZ ZX 850W

I have a feeling it's the motherboard.
a b V Motherboard
September 18, 2012 11:48:58 AM

You sure it's not a shorted reset switch? Or the mobo is not shorted on it's back side by a metallic part?
September 18, 2012 11:59:03 AM

I'm sure, I've tried powering the system on without the reset switch attached and the same thing happens. I checked the case before I installed the motherboard and I couldn't find anything that might cause a short; standoffs are in the right places, etc.
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a b V Motherboard
September 18, 2012 11:14:55 PM

If it doesn't work with minimum components required (PSU, CPU, graphics, one RAM stick), I would squarely blame the mobo ((provided these components are good).
September 19, 2012 12:00:27 PM

house70 said:
If it doesn't work with minimum components required (PSU, CPU, graphics, one RAM stick), I would squarely blame the mobo ((provided these components are good).


Yep, the same thing happens no matter what I try.

PanicMaster85 said:
check your psu
http://www.youtube.com/watch?v=5FWXgQSokF4

Update Bios
http://www.tomshardware.com/forum/308518-30-update-bios

reset cmos
http://www.youtube.com/watch?v=Pdp_L5IxaNI

run memtest(if you can)
http://www.memtest.org/

check all connections

and if none of these do anything be sure to use the case speaker to see how many beeps, and also I agree i think it is the mobo if nothing works i recommend rmaing the thing soon


The only thing I've actually been able to do is reset CMOS and that hasn't worked. The system doesn't stay on long enough to even enter the BIOS.

I've since tried my gear in another motherboard and everything worked fine. This is a real bummer; this is the first time I've ever had anything arrive dead! Anyway, thanks for the suggestions guys.
a b V Motherboard
September 20, 2012 12:01:14 PM

yerjam said:
Yep, the same thing happens no matter what I try.



The only thing I've actually been able to do is reset CMOS and that hasn't worked. The system doesn't stay on long enough to even enter the BIOS.

I've since tried my gear in another motherboard and everything worked fine. This is a real bummer; this is the first time I've ever had anything arrive dead! Anyway, thanks for the suggestions guys.

Yep, always a bummer. I would send the darn thing back and put all this behind.
Good luck!
September 20, 2012 12:35:20 PM

I would try 1 stick of RAM you know is good.
Last computer I put together did that, was in a endless reboot cycle, lights on motherboard would flash and then it would restart. Turned out the motherboard didn't like one of the sticks of RAM for some reason...
September 20, 2012 1:05:43 PM

So before I applied for an RMA I thought I'd give it one last try. I reseated the CPU in the motherboard and... BAM. Everything starts up, Windows boots, whoo! I did actually have a few fist pumps to myself after everything started up. :D 

Don't know what it was. Maybe bit of dust got stuck in the CPU socket after I initially put it together, who knows. It's working now anyway, over the moon. Been without a computer for like two weeks now, good to have everything up and running again.
a b V Motherboard
September 20, 2012 7:16:03 PM

yerjam said:
So before I applied for an RMA I thought I'd give it one last try. I reseated the CPU in the motherboard and... BAM. Everything starts up, Windows boots, whoo! I did actually have a few fist pumps to myself after everything started up. :D 

Don't know what it was. Maybe bit of dust got stuck in the CPU socket after I initially put it together, who knows. It's working now anyway, over the moon. Been without a computer for like two weeks now, good to have everything up and running again.

Yay, glad for you. :bounce: 
Enjoy your system.
a b B Homebuilt system
September 20, 2012 10:45:16 PM

hahah glad to help! :D 
!