LinuxQuestions.org
Share your knowledge at the LQ Wiki.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Hardware
User Name
Password
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

Notices



Reply
 
Search this Thread
Old 06-19-2007, 12:04 AM   #1
davidguygc
Member
 
Registered: Jul 2004
Location: Lubbock, Texas
Distribution: Slackware 12.0 with Beryl 0.2.1
Posts: 334

Rep: Reputation: 30
What would cause a computer to shut off?


Hi, earlier today while I was taking a nap my computer all of a sudden shut off for no apparent reason. When I tried to turn it back on, it wouldn't, the lights on the mobo weren't on. I tried unplugging and plugging it back in, still no luck. I tried doing this for about 5 mins in different sockets, then all of a sudden it started working fine again. I don't think the power went out, my alarm clock didn't reset. Any ideas?
 
Old 06-19-2007, 02:00 AM   #2
tredegar
LQ 5k Club
 
Registered: May 2003
Location: London, UK
Distribution: Debian "Jessie"
Posts: 6,038

Rep: Reputation: 373Reputation: 373Reputation: 373Reputation: 373
Overheating. So it shut down to protect itself. When it had cooled down, you could restart it.
Clean out the case. Check your cooling fans.
 
Old 06-19-2007, 02:01 AM   #3
j-ray
Senior Member
 
Registered: Jan 2002
Location: germany
Distribution: ubuntu
Posts: 1,458

Rep: Reputation: 104Reputation: 104
a defective contact in your power pack maybe?
but tredegar's explanation is more likely.

Last edited by j-ray; 06-19-2007 at 02:02 AM.
 
Old 06-19-2007, 02:03 AM   #4
slakmagik
Senior Member
 
Registered: Feb 2003
Distribution: Slackware
Posts: 4,113

Rep: Reputation: Disabled
yeah, bad psu was going to be my guess. I've had both the fans/overheating situation and the psu situation.
 
Old 06-21-2007, 10:05 PM   #5
davidguygc
Member
 
Registered: Jul 2004
Location: Lubbock, Texas
Distribution: Slackware 12.0 with Beryl 0.2.1
Posts: 334

Original Poster
Rep: Reputation: 30
OK, that's what I figured, thanks.
 
Old 06-24-2007, 03:15 AM   #6
davidguygc
Member
 
Registered: Jul 2004
Location: Lubbock, Texas
Distribution: Slackware 12.0 with Beryl 0.2.1
Posts: 334

Original Poster
Rep: Reputation: 30
OK, well it happened again, I think. How can I tell if it overheated? It seems to happen only when I'm not paying attention to it.
 
Old 06-24-2007, 10:51 AM   #7
jimmy512
Member
 
Registered: Oct 2006
Location: London
Distribution: Arch
Posts: 183

Rep: Reputation: 31
Go into your BIOS and run the computer for a while. Monitor the temperatures on the cpu and motherboard. I had a similar situation where the fans were clogged with dust, and this was causing the cpu to get hot. There should be software for linux too that can monitor the temperature of your cpu (I think conky can), but I'm not sure how to use this.

Last edited by jimmy512; 06-24-2007 at 10:52 AM.
 
Old 06-24-2007, 10:54 AM   #8
slackhack
Senior Member
 
Registered: Jun 2004
Distribution: Arch, Debian, Slack
Posts: 1,016

Rep: Reputation: 46
monitor lm_sensors while running something that taxes your cpu. if it shuts off when it gets to a certain temperature, you'll know that's the problem. otherwise, i would guess bad power supply along with the others.
 
Old 06-24-2007, 02:10 PM   #9
IsaacKuo
Senior Member
 
Registered: Apr 2004
Location: Baton Rouge, Louisiana, USA
Distribution: Debian 4.0 Etch
Posts: 1,349

Rep: Reputation: 49
I'd suspect a bad motherboard or bad PSU before I'd suspect overheating. But then, I work a lot with older hardware, and the motherboard is often the first thing to go bad.
 
Old 06-24-2007, 03:29 PM   #10
slakmagik
Senior Member
 
Registered: Feb 2003
Distribution: Slackware
Posts: 4,113

Rep: Reputation: Disabled
Well, I agree with you IsaacKuo - when the machine that overheated overheated, it came right back up. The problems you had with restarting your system, davidguygc, makes me think PSU. If your cooling fans are operational and it's got good airflow around it, it really shouldn't be overheating.
 
Old 06-24-2007, 05:09 PM   #11
davidguygc
Member
 
Registered: Jul 2004
Location: Lubbock, Texas
Distribution: Slackware 12.0 with Beryl 0.2.1
Posts: 334

Original Poster
Rep: Reputation: 30
Well I have a brand new PSU, and it finally happened while I was on the computer, I was just on imdb.com, not even listening to music or anything. Just Firefox. The PSU is Thermaltake TR2 W0070RUC ATX 430W Power Supply 115/230 V I decided to get a slightly better than average power supply. My MoBo is MSI P6N SLI-FI LGA 775 NVIDIA nForce 650i SLI ATX Intel Motherboard I have been running Windows past day or so, and it has happened on it too. So I got SpeedFan, and it has yet to set off any alarms I set. The fans are completely unblocked, are clean and about 2 mos old. The entire system is about 2 mos old. The computer's main temp has been running around 32 C, and the CPU's between 35-45. The limit is around 81. I don't have any real feel for what those temps are, I'm used to Fahrenheit.

Thanks for the input

P.S. I don't think it is OS related at all, since I cannot turn it back on. The routine to get it back going is to unplug it, plug back in. I hit the power button, it powers on for about 1/2 sec, then shuts back off, repeat until it works. I ran "backed up" a DVD and the CPU Temps ran between 40-45 C So I really don't see it hitting the 80 C ceiling

Last edited by davidguygc; 06-24-2007 at 05:16 PM.
 
Old 06-24-2007, 05:50 PM   #12
slackhack
Senior Member
 
Registered: Jun 2004
Distribution: Arch, Debian, Slack
Posts: 1,016

Rep: Reputation: 46
well at least it doesn't seem to be overheating. those temperatures are fine. it could still be the PSU, or as IsaacKuo said the motherboard could be bad.

the next time it dies, you might try pressing in the power button for a few seconds *with the power cable unplugged* to "clear" any charge in the motherboard before plugging it in again and trying to start it. that might at least let you power back on sooner until you can find out the problem.

i wonder if kernel.log or messages or anything like that would log a problem if it were something to do with the motherboard. there might be a hint at least. or maybe your bios needs to be flashed, is another idea. could be a lot of things, sorry.
 
Old 06-24-2007, 08:06 PM   #13
davidguygc
Member
 
Registered: Jul 2004
Location: Lubbock, Texas
Distribution: Slackware 12.0 with Beryl 0.2.1
Posts: 334

Original Poster
Rep: Reputation: 30
I know what ya mean, million of things, not a lot to go on with my info. First time something like this has happened, I don't know what info I need to give yall. Well, I'll look into the BIOS, and I have the PSU that came w/ the case, if it keeps happening I'll switch it out w/ that and see if it that fixes it. If so, then yay, I have it pinned down.

If yall have any suggestions keep em coming please, they all help immensely!

Thanks,
David
 
Old 06-24-2007, 08:37 PM   #14
Crito
Senior Member
 
Registered: Nov 2003
Location: Knoxville, TN
Distribution: Kubuntu 9.04
Posts: 1,168

Rep: Reputation: 53
Quote:
Originally Posted by davidguygc
The limit is around 81. I don't have any real feel for what those temps are, I'm used to Fahrenheit.
You observed a peak temp of 81C? My BIOS auto-shutdown doesn't even go higher than 85C. I currently have it set to 70C on my dual core 4400+. In other words, that's too hot. So IMHO the original diagnosis was correct.

I'd remove the heatsink and replace the pad/compound with some artic silver. I'd also look into the case ventilation, especially with a power hungry nVidia card cooking your capacitors.
http://www.aavidthermalloy.com/techn...apacitor.shtml
 
Old 06-24-2007, 08:54 PM   #15
Allen614
Member
 
Registered: Dec 2002
Location: Plains
Distribution: Slackware 13
Posts: 465

Rep: Reputation: 30
It's a bad power supply as long as your heatsink is not laying in the bottom of the case. (I actually have seen that.) Overheating CPU problems manifest themselves in poor performance long before they shutdown.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can Ktorrent shut down the computer? Tortanick Linux - Desktop 2 02-06-2007 11:28 AM
Can't shut down the computer emereck Linux - Newbie 6 04-22-2006 01:52 AM
Can't get the computer to shut off automatically KezzerDrix Mandriva 12 03-30-2005 09:07 AM
HELP! -> Computer won't shut down! chocobanana Linux - Hardware 19 03-24-2005 10:15 AM
Computer Won't Shut Down djabbot Linux - General 3 01-11-2005 02:07 AM


All times are GMT -5. The time now is 10:38 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration