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Trying to figure out shut down problem

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#1 GreySocksRkewl


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Posted 10 November 2011 - 08:26 PM

Built a new desktop about a month or so ago. Everything was fine until a couple days ago. I came home and was told the computer was shutting down randomly after about 15 minutes of use. I immediatly began troubleshooting, starting with recreating the incident, then going into safe mode and running low level diagnostics. Before I go any further, Ill go ahead and describe my setup.

mobo: MSI NF750-G55
RAM: 2x4GB Kingston /hyperX
HDD: Seagate 750GB Barracuda
CPU: AMD Phenom 2 am3 socket 3.2Ghz
Tower: Rosewell (the one with 7 fans/leds and 80% mesh) forgot the model # lol
PSU: Corsair 650watt bronze star certified
Graphics: Nvidea GT240
OS: Windows 7 home premium

So now thats out of the way, onto my annoying little problem.

The computer shuts down when:
after loging into windows, when windows is loading
when booting to safe mode (any type of safe mode)
when running sys restore
when booting off windows 7 repair disk

It first started shutting down only when u log in. Now it has progressively gotten worse and will not boot in safe mode at all. I also attempted to boot from Hirens on my dvd drive, and it does nothing.

I have taken the following troubleshooting steps with no success:

Run chkdsk (it shuts down during step 5/5
Run sys restore (shuts down in the beginning)
Reseat RAM
Try with 1 stick of RAM
Removed Video card and used mobo graphics slot (HDMI)
Strip down mobo to bare, reseated CPU, cleaned and reseated heatsink.
Rewired everything
Tried a clean install of windows 7 (shuts down during install and fails)

Nothing new was added or downloaded before this happened. It worked just fine, all system temps were fine and no errors before. I am out of ideas and need other input before I determine for some odd reason the dvd and hdd drives are bad and replace them. Thanks for any and all help with this.

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#2 caperdog


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Posted 11 November 2011 - 10:18 AM

sounds hardware related. to eliminate drives remove dvd drive and test with hard drive only. then remove harddrive and reconnect dvd. boot something like ubuntu live cd.

motherboard... look at capacitors for leaking or swollen tops.

when you had it stripped to "bare" you can start a computer with CPU, RAM, video card and keyboard. then add parts till problem arises.
happy troubleshooting

#3 abauw


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Posted 11 November 2011 - 11:02 AM

Have you check your Computer (Processor) Heat? If not please check it.
Maybe you problem is overheat and make your Mainboard active autoshutdown function to prevent something get burn because that heat.

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