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Computer stuck in boot loop

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Unread 11-10-2010, 11:18 PM   #1
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Windows 7


Computer stuck in boot loop

Hello all.
Last Christmas I built my first rig. Everything has went smoothly up until yesterday night.
Same as a typical night, I was messing around with C++ when my computer turned itself off. Immediately, it powered back up and after just 2-3 seconds it shut down again. This cycle continued for about 30 seconds before I cut power to the machine.
I tried again tonight with the same results. Here are my system specs:
ASUS P7P55D Deluxe
i7 860
Corsair Dominator 4x2 GB
XFX Radeon HD 5850 XXX Edition
WD 640GB Black Caviar x2 Raid 0
Sony Optiarc DVD-RW
Corsair HX850
Antec 1200
SyncMaster 245BW
Windows 7 64 bit

Nothing makes it to my monitor in the time before the power failure. All LED's on the motherboard are lit up, all fans spin correctly. I'm unable to determine anything about the POST, there is no internal speaker.

Thank you in advance for taking time to address the issue.
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Unread 12-10-2010, 04:27 AM   #2
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Re: Computer stuck in boot loop

either your power supply, video card is most likely broken.
also possible is a cpu overheat.
-
if you have built in video on your moboard, remove video card and test.
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Unread 12-10-2010, 05:45 AM   #3
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Re: Computer stuck in boot loop

You Shouldn't mess around with that sort of stuff you could have a VBScript Virus
Basicly a .autorun.vbs That shuts down the the computer when ever you turn it on because it will write a file in you registry which will tell you computer to shutdown when windows starts to load
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Unread 12-10-2010, 06:41 AM   #4
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Re: Computer stuck in boot loop

i was thinking a vbscript virus should not have shut his pc off.
so i'd like to rule out a hardware failure first before doing software troubleshooting
and since he assembled his rig himself, he'd know how to do it.
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Unread 12-10-2010, 10:14 AM   #5
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Re: Computer stuck in boot loop

mostly likely it looks like a hardware problem...

check ur video card then all ur cooling system avail...
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Unread 13-10-2010, 03:00 PM   #6
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Re: Computer stuck in boot loop

Quote:
Originally Posted by wcogent View Post
i was thinking a vbscript virus should not have shut his pc off.
so i'd like to rule out a hardware failure first before doing software troubleshooting
and since he assembled his rig himself, he'd know how to do it.
-
I'd have to agree with this.

Are you accidentally overclocking your system? That's a frequent issue. Also, are you getting a blue screen or no?
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Unread 13-10-2010, 05:11 PM   #7
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Re: Computer stuck in boot loop

i would suggest you diable automatic restart from this follow steps

this will help you the next time problem comes and you can find the error in a blue screen..

post it error here..

Start > right click on My Computer > Properties > Advanced tab > Setup and Recovery 'Settings'

UN check 'Automatically Restart'. Click OK.

you can also go by pressing f8 (safe-mode ) and do the same
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Unread 13-10-2010, 11:26 PM   #8
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Re: Computer stuck in boot loop

Thank you for your replies.

Sorry for the slow update, I have been busy with work.

Quote:
either your power supply, video card is most likely broken.
also possible is a cpu overheat.
I believe your first assumption is correct.

Quote:
Are you accidentally overclocking your system? That's a frequent issue. Also, are you getting a blue screen or no?
The system was slightly overclocked. From factory 2.8 to a modest 3.2. The memory was also slightly overclocked, however it was designed to function at that speed and voltage. There is no blue screen. Everything remains black until the power fails before POSTing.

Quote:
i would suggest you diable automatic restart from this follow steps
I cannot do this as my computer will not power on.

Tonight I had some time to experiment. I reseated everything on the motherboard except the CPU and cooler. The problem persisted.

I was very sure it was a fried motherboard. However I decided to investigate before I sent an RMA request to ASUS.

I decided to test the PSU by hooking it up to another PC that works. I plugged the 20-pin power and the 4-pin power into the older motherboard, and what do you know.. My old computer now shut off after just a second or less after being turned on. I am fairly certain that's the problem and hope that Corsair is cool about the RMA process.

But I do want to make sure that all that needs to be plugged in for the PSU to work is the 20 pin and the 4 pin that the motherboard requires.

Thank you all for the feedback.
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Unread 14-10-2010, 02:33 AM   #9
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Re: Computer stuck in boot loop

That's what I assumed, hardware issue. I just actually went through that on my most recent PC. It sucks, really.

Careful as it could be a multitude of issues though. Not just the one piece but others as well. You'll have to replace that first though of course and see how it plays out.

Best of luck

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Unread 14-10-2010, 07:13 AM   #10
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Re: Computer stuck in boot loop

Note that an instant pc shutoff could just mean the old computer's motherboard is intel chipset. There are certain boards that turn on, then suddenly turn off, then turn on again.
-
also, disable your overclock
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