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New motherboard won't boot. Turns off 2 seconds after turning on.

Tags:
  • Gigabyte
  • Boot
  • Short Circuit
  • Motherboards
Last response: in Motherboards
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September 24, 2014 11:13:56 AM

Hi! I just got a new motherboard. It is the Gygabyte GA-Z77X-UD3H (rev 1.1). I replaced the old motherboard with the new one but when I turn on the power, fans start running and LEDs turn on but 2-4 seconds later, they turn off again. Like 5 seconds later, it tries to boot again but the same thing happens. This cycle is repeated until I power off the PSU. All through this process, the motherboard light remains on. Also, the LED that's supposed to show error codes doesn't show anything.

I made sure everything was connected properly twice and I had also taken all precautions against ESD. I tried powering it with only the minimal stuff (CPU, heatsink, CPU fan and one stick of RAM) to no avail. Next, I figured maybe there was something shorting somewhere but upon checking, I found nothing unusual. I even removed the board from the case and ran it atop a non-conductive surface but the same thing happened. I also reseated the CPU, thermal paste and heatsink and made sure that the CPU socket pins were alright. I even flipped the switch to run on backup BIOS instead of the main BIOS (I figured maybe the BIOS version could be incompatible to my CPU or something like that).

The PSU is good. It works perfect on another system. The RAM is also good, to my knowledge. Does that mean i have a faulty motherboard? Or did I short something when installing the board? Or is it a much simpler issue that's preventing the system from booting? Please help!

This is my build:
Motherboard: Gigabyte GA-Z77X-UD3H (rev. 1.1)
CPU: Intel Core i7-2600 3.4 GHz Quad core processor
Case: Thermaltake Commander MS-I Snow Edition
RAM: 12GB DDR3 RAM (2x4GB; 2x2GB) running at 1600MHz
HDD: 2TB hitachi hard drive
GPU: Gigabyte NVIDIA GeForce GTX 660ti 2GB
PSU: Corsair CX750M
OS: Windows 7 Home Premium 64-bit.

More about : motherboard boot turns seconds turning

September 24, 2014 11:54:47 AM

Hi s3r19lk1ll3r.
Do you get any form of display feedback during those few seconds? If not, it sounds like the CPU might not be getting enough power. Check that the ATX power connectors on the motherboard (not the main power, the two smaller plugs that should be somewhere close to the CPU) are properly connected, I have been caught forgetting to plug those back in a lot. If it's not that, and you have other RAM, try booting with different RAM, just to be safe, or just re-seat the RAM to a different channel (a single stick).
Hope you get it up and running soon!
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September 24, 2014 12:14:14 PM

Carlo Rall said:
Hi s3r19lk1ll3r.
Do you get any form of display feedback during those few seconds? If not, it sounds like the CPU might not be getting enough power. Check that the ATX power connectors on the motherboard (not the main power, the two smaller plugs that should be somewhere close to the CPU) are properly connected, I have been caught forgetting to plug those back in a lot. If it's not that, and you have other RAM, try booting with different RAM, just to be safe, or just re-seat the RAM to a different channel (a single stick).
Hope you get it up and running soon!


Thanks for the reply! when i hit the power, the monitor flickers like it's about to display something but the motherboard shuts the system down before it can. The ATX connectors for the CPU seem to be clipped firmly into place. I tried plugging one 4-pin connector and both connectors but the problem persists. I will try to get my hands on my friend's RAM and try out what you suggested. Stick around!
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September 24, 2014 12:28:05 PM

s3r19lk1ll3r said:

Thanks for the reply! when i hit the power, the monitor flickers like it's about to display something but the motherboard shuts the system down before it can. The ATX connectors for the CPU seem to be clipped firmly into place. I tried plugging one 4-pin connector and both connectors but the problem persists. I will try to get my hands on my friend's RAM and try out what you suggested. Stick around!


Hey no problem! The problem is definitely either the RAM, CPU or the PSU, the trick is just figuring out which... But if you used all those parts on your previous mobo without issues I would say it may be a faulty motherboard... But check the system with other RAM, maybe another PSU, otherwise your shiny new motherboard might be the culprit...
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September 24, 2014 2:41:49 PM

I tried with a different RAM on different slots but the same thing happens :( 
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October 7, 2014 5:50:34 AM

s3r19lk1ll3r said:
I tried with a different RAM on different slots but the same thing happens :( 

Then it's probably a faulty motherboard...

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October 14, 2014 7:59:15 AM

try putting your parts back in the old mother board.
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