ASRock Z77 Extreme4 Not POSTing?

megamanacses

Honorable
Apr 15, 2013
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10,510
I'm trying to troubleshoot some hardware on my system.
My system consists of:

ASRock Z77 Extreme4
EVGA Nvidia GTX 660
Corsair TX650 650 Watt PSU
Corsair Vengeance 2 X 4GB 1600 DDR3 9-9-9-24
Intel i5 3570k
ASUS DVD-R Drive
ASUS BT211 Bluetooth Dongle
Western Digital Caviar Black 500GB 7200rpm 32MB Cache x3

I've tested the RAM, the PSU, and the harddrive array. All seem to be in functioning order. I had to test the PSU with a lower-powered system that uses an LGA 775 4-pin connector rather than an 8-pin as my 1155 uses, although the system did boot properly into Windows Recovery as I did not have an OS installed for the machine.

The motherboard still will not POST even without all hardware (except the CPU) detached. I can't test the CPU seperately because I don't have another motherboard that supports LGA 1155 to do so.

On power up, all of the fans and their LEDs spin up at max rpm and then slow down as usual, except for "CPU Fan 2," which powers up along with its LED for a split second and then shuts off. Power through the USB ports also functions. My monitor simply shows a black screen rather than showing an "input not detected" message.

Some more information, the system was working properly until it suddenly shut off while at mid load, I'm also exactly 2 weeks into ownership and have the ability to refund or replace it.

If anyone has any idea if the problem is genuinely the motherboard, please tell me, I'm trying to figure out what to RMA so I don't end up with a still broken system after waiting a week for shipping something that has nothing wrong with it.
 

megamanacses

Honorable
Apr 15, 2013
3
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10,510
Hello,

I recently had the same situation with a 775 board, I removed the cmos battery and put it back in, try that.[/quotemsg]

Tried, did not work. I used a different PSU as well to test the motherboard/cpu, still no lights or POST.
 

jts23

Honorable
Dec 11, 2012
108
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10,710
I've read of another situation where a mobo didnt post due to agressive ram timings set by the board. If you leave the ram and cpu in but remove the gpu and it doesnt give a video signal then its possibly a ram problem.
 

megamanacses

Honorable
Apr 15, 2013
3
0
10,510


I doubt this is the problem, I've tried booting with each ram stick set up in different locations with different amounts of RAM, I still get the same results. Everything powers up except CPU Fan 2 and the Dr. Debug LED, and then the motherboard fails to post.