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Windows 7: Random shutdowns / loss of power


24 Mar 2010   #1

Windows 7
 
 
Random shutdowns / loss of power

So about a week ago now my main system has just started to randomly shutdown. Not like shutdown in the sense it exits windows and powers down. I mean like i'm typing this message and now the power is out. The only way to power the system back on is by power cycling the UPS it's connected to and then powering the system itself back on. If I don't unplug the power, then I can't reboot.

So I thought it might be a heat issue and when checking the video card (GTS 250) it's at 111 F. The CPU is sitting at 107 and the MB is at 96.

After this started to happen, I went through and dusted everything off and started to monitor the heat. No spikes or high temps at any point. I tried to see if I could figure out what i needed to do to make it power down, and so far in the last 2 hours I have had it power down about 5 times on me now. I can't seem to find a reason.
ASUS PC Probe is currently reporting my voltages at 1.30, 12.03, 5.08, 3.31 for the rails and they don't seem to flucuate to much.
I have had the system power down on me from a cold start (powered off most of the day) and probably 4 min into it, shut down. It will at times go for hours with no problem, and then I click a link in a website and no power. Was typing an email Monday, had IE open in two instances...shut down. Earlier tonight I was working away on something and lost power. Rebooted, email client loaded and then I went to visit one website I was trying to get to and lost power again (about 1 min 50 after booting back up from the last one. I just lost power before posting this while trying to research reason it could be happening, and in the time it took me to write this message, no power loss. It could very well stay on now for the rest of the night, or it could power down as soon as I hit submit...I have no idea anymore. Anyone got a clue here?

My System SpecsSystem Spec
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24 Mar 2010   #2

Windows 7 Enterprise 64-bit
 
 

It definitely seems like a hardware issue. Are you sure nothing is overheating?
My System SpecsSystem Spec
24 Mar 2010   #3
ryo

 
 

hello troyfrezze and welcome to seven forums,

due your information, when the power is down whenever you type or hit submit, i think that's not sense.
try to check your power options, at power schemes. in there have some setting to turn off system.
My System SpecsSystem Spec
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27 Jun 2010   #4

Windows 7 Professional 64 bit (6.1, Build 7600)
 
 

Is there a common software you are running when shut downs happen? Have you tried booting to safe mode with command prompt. Running chkdsk c:/f If you have any other hard drives run it for each drive. Also run sfc /scannow . Let us know what each check disk and sfc.
My System SpecsSystem Spec
27 Jun 2010   #5

Windows 7 Enterprise 64-bit
 
 

Quote   Quote: Originally Posted by Rothmclear View Post
Is there a common software you are running when shut downs happen? Have you tried booting to safe mode with command prompt. Running chkdsk c:/f If you have any other hard drives run it for each drive. Also run sfc /scannow . Let us know what each check disk and sfc.
Good work, although this thread is from the end of March, and the OP is unlikely to respond. +Rep for help though
My System SpecsSystem Spec
27 Jun 2010   #6

Windows 7 Professional 64 bit (6.1, Build 7600)
 
 

lol i always miss dates. thanks
My System SpecsSystem Spec
28 Jun 2010   #7

Windows 7
 
 

I finally determined it to be my power supply. I swapped it out for another one since nothing else was making sense. Every test I ran on the power supply came back fine, but in the end, it was the problem.

it's kinda funny you bring this back up though. Just this week, the power supply on my home server has suddenly started doing the same thing. The system boots up, and again, just shuts down.
In both cases, neither supply was more then 4 years old and I've had PSU's running for alot longer with no issues. I assume it has something related to power in my building as it's had issues up here that the landlord doesn't want to do much to fix. So I have always put my systems on UPS's to protect against power problems.
My System SpecsSystem Spec
28 Jun 2010   #8

Windows 7 x64, Windows XP SP3, Fedora
 
 

Quote   Quote: Originally Posted by Troyfrezze View Post
I finally determined it to be my power supply. I swapped it out for another one since nothing else was making sense. Every test I ran on the power supply came back fine, but in the end, it was the problem.

it's kinda funny you bring this back up though. Just this week, the power supply on my home server has suddenly started doing the same thing. The system boots up, and again, just shuts down.
In both cases, neither supply was more then 4 years old and I've had PSU's running for alot longer with no issues. I assume it has something related to power in my building as it's had issues up here that the landlord doesn't want to do much to fix. So I have always put my systems on UPS's to protect against power problems.
It depends what the quality of the PSUs were too. A cheaper PSU will always be less able to cope with fluctuations etc. than a quality one.
My System SpecsSystem Spec
28 Jun 2010   #9
ryo

 
 

Quote   Quote: Originally Posted by Troyfrezze View Post
I finally determined it to be my power supply. I swapped it out for another one since nothing else was making sense. Every test I ran on the power supply came back fine, but in the end, it was the problem.

it's kinda funny you bring this back up though. Just this week, the power supply on my home server has suddenly started doing the same thing. The system boots up, and again, just shuts down.
In both cases, neither supply was more then 4 years old and I've had PSU's running for alot longer with no issues. I assume it has something related to power in my building as it's had issues up here that the landlord doesn't want to do much to fix. So I have always put my systems on UPS's to protect against power problems.
yah using UPS is more secure,if you're losing power, we can't know when the time lose power. so sure, more safe is using UPS.
My System SpecsSystem Spec
28 Jun 2010   #10

Windows 7 Professional 64 bit (6.1, Build 7600)
 
 

Try finding a UPS with an AC filter or you could double UPS as in one ups plugged into the other. I have seen "dirty power" do some pretty nasty things to systems.
My System SpecsSystem Spec
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 Random shutdowns / loss of power




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