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GA-H55M-UD2H reboot loop

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  • Reboot Loop
  • BIOS
  • Motherboards
Last response: in Motherboards
a b V Motherboard
December 4, 2013 6:04:54 AM

Hi guys, I need some Gigabyte Mobo experience...

After being manually powered off my pc keeps rebooting before it even posts the BIOS.
I have had this build working perfectly for a few years now and I've never had a single issue.

When the power button is pressed the it lights up, then makes a long 'buzzing' sound then reboots. The sound is not a normal BIOS beep (I know very well what a BIOS error beep sounds like and this is not normal).

I have witnessed this behavior in the past after starting up from sleep mode, but when that happened it made the buzzing sound continuously without restarting. When this happened I held down the power button and then restarted. It did start up after that and I just didn't bother with it and simply never used sleep mode again.

Unfortunately I didn't have the time to check it out in depth because I had a trip planned.

Mobo: Gigabyte GA-H55M-UD2H
CPU: Intel i5 660 LGA1156
RAM: 8GB Corsair 1600 DDR3 XMS3
PSU: Coolermaster Silent Pro 550W
GPU: XFX Radion HD4770
SSD: OCZ Agility 3

I'm kind of hoping a CMOS reset will sort it out but I would really appreciate any ideas or feedback from anyone who has experienced a similar issue.

More about : h55m ud2h reboot loop

a b V Motherboard
December 6, 2013 12:54:13 AM

Thanks for the answer.

Since I'm not home to do the troubleshooting myself I got a friend to have a look, he actually did do a cmos reset and also re-seated all the ram modules. Unfortunately there was no difference.
I did get to hear the buzzing sound again, and to be exact, it sounds more like the beep is jammed.
Like multiple single beeps in very close succession.
If it were a cpu or ram error i believe that there would be a longer pause between the beeps so this got me thinking...
How plausible would it be for the case to be the root of the problem?
Could it be possible to be a jammed or faulty switch/led module (board) on the case?

The case is not that great, It is probably the least expensive thing on my build, the lowest-end part.

Other than that my second guess would probably be the PSU.

How does all that sound?
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a c 4059 V Motherboard
December 6, 2013 11:23:15 AM

Could pull the guts and bench it, make sure no short on the mobo
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a b V Motherboard
December 11, 2013 10:07:05 PM

Tradesman1 said:
Could pull the guts and bench it, make sure no short on the mobo


I finally did find the time to gut the PC. I pulled it all out and re installed everything restarting each time.
It turns out that the CMOS was shot! After the first reboot the bios found the fault and restored it. On the second reboot it found a checksum error so I entered the bios and reset everything.
It did start up after that but it would do a short pause after the power button was pressed, then it would power down for a second an then power up almost normally. During the post, I noticed that the Gigabyte logo screen wouldn't display as it should though. So once all the parts were back in I downloaded the bios and re flashed it (with the latest version that was already installed anyway).
That was pretty much it...

It has been running flawlessly since.
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a c 4059 V Motherboard
December 12, 2013 8:34:59 AM

Glad to hear all is well, now go have some fun w/ it ;) 
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