Link to home
Start Free TrialLog in
Avatar of DATA99
DATA99Flag for Afghanistan

asked on

Computer randomly shuts down

Hi my computer keeps shutting down randomly, i have tested the memory, hard drive, PSU everything and still cant put my finger on why it keeps doing this.  I would just be running a virus scan using symantec or on the internet or just typing word documents and it would shut down, i'm not doing anything specific that is causing the problem.  I got a new PSU and new heatsink thinking these were the problems and has failed to solve the problem, please can someone help?
Avatar of pistolslapper
pistolslapper

Does the computer drop dead or shutdown gracefully?
Avatar of DATA99

ASKER

the computer just drops dead, have just had it running again there and its just sitting on desktop without doing anything and its dropped dead.  Temperatures are al fine so not overheating
Have you changed the power supply cable just to rule that out? Maybe tried a different wall socket?
Avatar of DATA99

ASKER

yeh i put a new PSU in thinking it was that since i had ruled out memory, HDD, and video card, have used 3 r 4 different cables and 2 r 3 different wall sockets
Avatar of dbrunton
It's possibly coming back to motherboard then.

Download the Knoppix Live CD http://www.knoppix.org/

Make the CD and boot from that and see how it runs.  If that's OK it could be your software.

Other checks you can do is look at the CPU fan and heatsink (check for dust buildup).
Avatar of DATA99

ASKER

thanks i'l give that a go and see if it works, was thinking its a software issues cause never come across this before and dont really think it could be motherboard but i'll give the cd a go and see if it works.

Both the CPU and Heatsink are brand new so no dust build up and rest of computer case is relatively clean and clear of dust.

I'll give this cd a go and let you kno how i get on
Has the operating system been fresh installed? If so, Did the problem happen before you installed the drivers for your hardware?
Avatar of DATA99

ASKER

it was a computer built for me by a friend about 3 r 4 months ago and it started happening occasionally and then never happen for a while but after 4 r 5 boots it would happen again.  
Do virus scans cause it to reboot?  Or can you finish a virus scan without that happening?
Avatar of DATA99

ASKER

initially i couldn't finish a virus scan using symantec or spyware scan using adaware but on the odd occasion now i can get through a whole scan no problem after about 3 r 4 restarts then i would try it again and it would shut down again
Does the PC shutdown completely or does it reboot? I.e do you have to manually turn the pc back on every time this happens?
Avatar of DATA99

ASKER

yeh it completely shuts down and i have to turn it back on everytime
Can you increment the power setting for your CPU in the bois? Could you try incrementing the core voltage by one step from what it currently is to see if this maybe stabilizes the system.

A bios update on the motherboard might be a good idea if a new processor has been added incase there are some issues with processors made after the motherboard was.

Can you give us a detailed spec of the processor and motherboard too?

Thanks
Avatar of DATA99

ASKER

hi no i cant change this setting in the bios

i will try and get the update for the bios for the motherboard thanks

the motherboard is an ASUS A8N32 - SL1 series and the processor is an AMD Athlon 64
Avatar of DATA99

ASKER

sorry the motherboard is an ASUS A8N32 - SLI
Avatar of DATA99

ASKER

hi i tried that knoppix cd and dont really know what to do with it when it loads but if it was just to try then the system didnt crash when it was loaded and stayed idle for a while
SOLUTION
Avatar of dbrunton
dbrunton
Flag of New Zealand image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
SOLUTION
Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Hmm.. it is a DIY then. Have you check the power cable from front panel? Some case with faulty front panel shorts the cable.
Another possibility, is a high temperature. Google for coretemp application, and put a log on your temperature. When you drop dead, check on the temperature log. Some mainboard has capability to shut down computer immediately on specific temperature. I usually set this to 60C, but some people with malfunctioning sensor could report an invalid number to windows utility, causing it to shut off.

Also, if your fan stops working (either by design, or by accident), your mainboard will cut power immediately.
Avatar of DATA99

ASKER

Ok i'll try leaving knoppix idle for a few hours, sometimes when i leave the machine idle for a couple of hours it will crash, so i'll try knoppix.  Yeh was just goin to reinstall the OS but thought would try this first.  Iv checked the power cable and temperatures and al have been fine so it is def not overheating.  

I'll try this knoppix cd again and see how it goes.
hmm... Have you check temperatur warning on bios setting?
Avatar of DATA99

ASKER

yeh was first thing i checked due to the nature of the shut down and all is fine
ASKER CERTIFIED SOLUTION
Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of DATA99

ASKER

i just reinstalled the operating system and this has worked no problem, no random shutting down or anything
Objection.

Reinstall was an option offered by people here after testing.
Split three ways.

dbrunton, pistolslapper, prd00
Like this?
http:#23661454
err.. sorry..
http:#23619754
As dbrunton said, split to three of us.

http:#23619754
http:#23501051
http:#23502445

I think.. those 3 are the closest ones to the solution of the problem as noted by the asker.

But I guess it would be more appropriate if other expert point to their own suggestion about reinstalling the operating system.
Avatar of DATA99

ASKER

Please provide points split over these three users dbrunton, pistolslapper, prd00