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Computer shuts off for reasons unknown.

Last response: in Systems
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November 28, 2012 11:16:56 AM

Hey all,

Lets start with my system specs, nothing fancy.

AMD 955 Phenom II x 4 BE
MSI NF750-G55 Mobo
8 Gigs G.skill RAM 240pin DDR3 PC3 12800
GTX 570 HD 1280MB
1 x Western Digital Caviar RE WD1600YD 160GB 7200
1 x Seagate DB35.2 Series ST3160212SCE 160GB
Corsair TX750 80 Plus
1 x SONY Black 16X DVD+R 8X DVD+RW 8X DVD+R DL 16X DVD-R 6X DVD-RW 16X DVD-ROM 48X CD-R 24X CD-RW 48X CD-ROM 2M Cache IDE DVD Burner
1 x LG Black 16X DVD-ROM 52X CD-ROM IDE DVD-ROM
1 x Lite On IHES312-98 12X Blu-Ray Drive - SATA
Cooler Master HAF 932 Case
COOLER MASTER Hyper N 520 CPU Cooler

I think that's all, at the beginning I would get up in the morning, and sit at my computer and I know I left it on, but it would be shut off, I thought my kids were coming by and shutting my computer down by the power button, Kids (Rolls eyes, lol). I would turn it back on and then go about my day. Well that happened a couple of times and I never thought anything of it. Well a couple of days ago I got up my computer was on, I logged in to team speak looked at the TV for a sec, looked back at the monitor and realized it was shut off, with a puzzled look on my face I hit the power button and nothing happened?? Great now what? So I opened my computer up and checked all my connections, and got my computer to power up, how? I don't know, but it didn't post. Just a blinking dash on the screen. Checked the connection to my HDD's and tried again, and got it to post and start up. After windows logs in and goes to desktop, my computer would just shut down. I can hit the power button and it will turn on but will continue to shut down.

I have had this computer together since 2010. Had only one issue since, i had to RMA my motherboard because it was auto overclocking my CPU, and would shut down when ever I tried to play any games, so I just got a new one and no issues since. Now I am having this issue and I have no idea what it could be. I put the power supply in another computer and it works well. I am using it as I type. So I figure its not the power supply. I am assuming I need a new Mobo or CPU but wanted some second opinions before I go about it. I also tried every RAM stick. No change it still shuts down.

If you guys can help thanks in advanced.

Best solution

a b B Homebuilt system
November 28, 2012 11:32:59 AM

sounds like your psu if dieing
test it with this
http://www.youtube.com/watch?v=5FWXgQSokF4

and also run memtest to test all your system parts
http://www.passmark.com/download/bit_download.htm

note: i think its your cpu(now that we know its not your psu) run that burnintest, or run y-cruncher for a while(if there are any errors it will pop up in red)
http://www.numberworld.org/y-cruncher/
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November 28, 2012 11:40:00 AM

I would love to run test on my CPU but my computer won't stay on lol. Any other suggestions?
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November 28, 2012 11:44:11 AM

probably the power supply or your heatsink on your cpu could have came loose and is overheating and shuting off. also it could be the the thermal compound. or you can send me your computer for parts haha :sarcastic: 
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November 28, 2012 12:30:04 PM

its an old build that was working great before this, so I am pretty sure everything is connected wisely. I did check every RAM slot and still no change.
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a b B Homebuilt system
November 28, 2012 7:19:27 PM

yeah its either the cpu or motherboard... do you still have coverage on both?
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November 28, 2012 7:43:35 PM

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PanicMaster85 said:
yeah its either the cpu or motherboard... do you still have coverage 11on both?


I think my CPU still has one year left on the Warranty, but the Mobo warranty is over. Which sucks, because I think that the mobo is my issue. Oh well, time to look for another one. Thanks for the input guys.
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a b B Homebuilt system
November 28, 2012 8:08:21 PM

no problem, are you able to test your cpu elsewhere in another comptuer?
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November 28, 2012 8:43:35 PM

PanicMaster85 said:
no problem, are you able to test your cpu elsewhere in another comptuer?


Unfortunately no, I have two 939 socket motherboards, one for a single core, and one for a dual core which I am using now. My motherboard is an AM3 socket so I have absolutely no way of testing it. I wish I did, that way I could try different options. I am going to run to Tigerdirect tonight and get some thermal compound and reset my heatsink and cpu and see if its not a temperature issue. If that doesn't help I will just buy a new Motherboard.
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a b B Homebuilt system
November 28, 2012 10:03:41 PM

alright, keep us posted
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December 2, 2012 9:12:24 AM

PanicMaster85 said:
alright, keep us posted


So I bought a cheap Motherboard off craigslist and plugged everything in, booted up just fine, no issues. So I will take it that the Motherboard was the issue. Just wanted to let you all know my findings. Thanks for all the help.
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a b B Homebuilt system
December 2, 2012 2:24:56 PM

ok, don't forget to pick a best answer

and no problem :D  glad to help! :na: 
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December 3, 2012 1:13:00 PM

Best answer selected by BannWorthRulz.
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a b B Homebuilt system
December 3, 2012 11:12:47 PM

glad I was able to help :D  I glad I think you have finally showed me the light on this problem(there are so many of them :p  its surprisingly pretty damn common, at least on this forum) I think because of this thread I will be able to help many more people and i thank you for this... hope the rest of your computering days works out for you and it was my pleasure to help! :na: 
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December 16, 2012 1:53:37 AM

After my last post, I had installed the new motherboard and then powered everything on. Did a fresh install and updated drivers. I am now using the M4A79XTD-EVO as a back up mobo until tax season. I would leave my computer on and then come back later, it would be shut off again. I know again! So I figured I would check the outlet because the house is old and I know it probably needed it. That was a day ago. So today I came home and my computer had a message stating that it had an unexpected shut down??? Sucks now I have this issue. Could be driver related but I have everything up to date. So I am not sure what is going wrong. Just wanted to update and see if anyone had an idea. Thanks.
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a b B Homebuilt system
December 16, 2012 10:24:21 PM

sorry double posted
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