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Help: PC Shutting down itself !

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My PC Shuts down itself without any warning. Stays ON for ~ 5 mins & turns off. CPU temperature goes 90 degree + (case is kept open as well) although cooling fans appear to work fine. Any suggest… Read More
edi Avatar
1d, 3m agoPosted 1 decade, 3 months ago
My PC Shuts down itself without any warning. Stays ON for ~ 5 mins & turns off.

CPU temperature goes 90 degree + (case is kept open as well) although cooling fans appear to work fine. Any suggestions ?? Or could there be any other problem?

Thanks :thumbsup:
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edi Avatar
1d, 3m agoPosted 1 decade, 3 months ago
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#1
do you get a box that comes up with a timer??
#2
birdyboyuk
do you get a box that comes up with a timer??


Can u explain a bit more birdyboy ? :thumbsup:
#3
well, the only thing I know about when your comp shuts down itself is the Blaster Worm Virus I think it is. Microsoft had a patch for it. Basically, a box would come up saying about an error and gave you 60 secs b4 it shutdown.

If thats not the case with you, perhaps it could be to do with your BIOS settings? Im not too technical with these! I think if your comp reaches a certain temp, it shuts down. I believe you can change these settings.

I hope I have kinda helped! Good luck :thumbsup:
#4
Switching off is without warning & happens even before Windows starts.
#5
maybe your hard drive is corrupt and cannot load windows???

Sorry I can't help you! :-(

Good luck tho, im sure its something simple!! :prop:
#6
birdyboyuk
maybe your hard drive is corrupt and cannot load windows???

Sorry I can't help you! :-(

Good luck tho, im sure its something simple!! :prop:


Thanks birdyboy :) hope its something simple... Tried reinstalling Windows but couldnt get through as the PC would shut down half way thru installation. :-(
#7
Have you tried looking on windows online help pages?? I find them quite useful!
#8
90+ degrees, yikes! Surely it should go no higher than 60? You could try putting a desktop fan next to the open case to try and narrow down the problem.
#9
Looking for a desktop fan.... & searching Windows help page too. Thanks Guys :)
#10
Edi, is it a custom build PC?

If so check the cpu is seated on the heatsink correctly, it could be the cpu shutting down the whole system because of the temps

Another idea might be to check your psu
#11
ive had this problem on HP Machines it was the motherboard, replaced and worked fine again....from the posts posted the pc dosent get to boot. If the pc runs fine then just goes into a hibernation mode that u cant get it out of unless u restart that is a bios isue (normal default bios cures this problem)
#12
The high temperature will automatically shut the pc down as a safety issue.
#13
It could be one of a few things but I would bet on something overheating. Follow blackster's advice and also check your capasitors.

If your case is open it will be easy for you to check the capasitors on your motherboard. I had the same problem, PC shutting down (it grew progresively worse, it was (still is) a emachines) and the offending items were 6 capasitors that were slowly dying. look for buldging and leaking capasitors.

Good luck, hope it's something small :)
#14
I used to have trouble with the Advent PC I had blue screening all of the time. I still put that down to over-heating...
#15
A sign of something overheating can also be spotted by the time between turning itself off decreasing...

For example, the first time you turn it on that day everything will start from cold and take a while to heat up so it may be 10 mins before the system turns itself off. If you then reboot straight away the components will still be hot so it doesn't take as long for the components to reach critical temperature and turn itself off again.

On new computers you can adjust the fan speed in the BIOS. Faster fan = cooler (but noisier) system. See if you have the option to turn the fan up and if you can if the system stays on any longer.

It would probably be useful if we knew the make and model of PC and if you've made any changes to it....
#16
Thanks guys :)

Its a custom build PC. Situation went progressively worse.... Starting CPU temp in a cold start is ~ 55 deg and goes to ~ 90 deg in minutes.

Once it turns off wont start for another 10 minutes.
#17
A few points from my experience (have built a few PCs in my time and have had similar problems).

1) Check that the heatsink and fan are attached to the CPU correctly, USING the heat-conducting paste that comes with most fans these days. If your CPU is getting to that temperature quickly then something is either wrong with i) the cooling system or ii) the motherboard (and is reporting the temperature incorrectly). BTW I assume you are talking about degrees celsius when you're giving temperatures? In this case, the CPU is getting VERY HOT!!!

2) Do you have 2 pieces of RAM? Often I have found that they should be compatible according to specifications, but don't like each other as they are different manufacturers. Try removing one of the pieces of RAM (i.e. so you on ly have one left in the computer) and see if the computer still re-starts. This happened to me, so I bought 2x 512mb RAM from the same company and sold my two previous 512mb RAM sticks individually on Ebay.

3) Computer cases are actually designed to be aerodynamic - i.e. cold air comes from the front of the case at the bottom, your computer parts warm it up, and the hot air is blown out the top of the case at the back. Taking the side off the case actually reduces the cooling ability (as you don't get this good airflow) as the cold air that is drawn into the case just goes out the side. Stagnant hot air just stays around your crucial components and they overheat.
#18
how do u edit the fan speed in the BIOS? cheers
[mod]#19
I wish i could help edi, but i'm totally clueless - hope you get it al sorted!
#20
uk-mobileshop
how do u edit the fan speed in the BIOS? cheers
I don't think you can, unless you have special variable-speed fans with the corresponding interface on the motherboard.

You can get voltage convertors to run 12v fans at 9v etc. this slows them down and they're quieter. You can also get fan speed adjusters which are dials that sit in the 3.5" or 5.25" bays in the front of your PC, and the fans plug directly into them and not into the motherboard (sometimes this causes problems because your MB thinks you don't have a CPU fan and won't let the computer boot up).

To be honest I'd leave the fan speeds as they are, otherwise you run the risk of overheating.
#21
without knowing the specs of the system id have to say no cpu i have used runs at 90C which is a sight of definite over heating, id suggest you check the cpu heat transfer paste as it may have run out if this is not the case a new cpu fan as this may have worn out although sill spinning.
#22
Thanks guys :)

1. temp is in Celcius
2. case is left open

I have put a desktop fan .... waiting to see if the PC dies again.
#23
Once it turns off wont start for another 10 minutes.

A classic symptom of an overheating CPU!

Do you have a separate graphics card? It may be that if you are using a graphics chip as opposed to a graphics card that the chip can't cope with what you're trying to do. However, as you built the PC yourself I suspect you have a graphics card, in which case it must be the main CPU that is the problem.

Can you try another CPU to see whether or not the CPU is at fault?
#24
Might be a software conflict. How long has it been happening ?
If your using xp and you know it was working a month ago, try a system restore
might work for you.
Fixed one last week for a friend with exactly the same symptoms.

I thought it was the processor heating up too, tried restoring but it didn't work, then wiped operating system and reinstalled and everything as good as new again.

I think my friends son had been on MSN and downloaded sommit he shouldn't have.

Hope you get sorted. Let us know
#25
how do u edit the fan speed in the BIOS? cheers


It will all depend on your system hardware and BIOS version.

We get HP DC5100s at work and they have the option in the system configuration in the BIOS.
#26
edi
Thanks guys :)

1. temp is in Celcius
2. case is left open

I have put a desktop fan .... waiting to see if the PC dies again.
I'm almost certain there's a problem with the CPU heatsink / fan.

Disconnect it and re-connect it (as it may have become partially unattached), if that doesn't work then get a new heatsink and fan (they're available for under £10).

What do you mean by a desktop fan? Do you mean a case fan?
#27
Its nearly 30 mins and still ON .... Using a desktop fan & the room temp is 15 C with the windows open. May be my PC is for outdoor use now :w00t:

Edit : Using a mini Table fan ...
#28
The thing is - if your heatsink is not properly connected to the CPU then no amount of cold air blasted in will cool it. The heatsink is required to draw heat from the CPU and then has a huge surface area to lose the heat. If you are able, take the heatsink off and put it back on again (maybe with thermal grease).
#29
Its nearly 30 mins and still ON .... Using a desktop fan & the room temp is 15 C with the windows open

Re-inforces my view that it's an overheating CPU...
#30
Clean installing XP as well...
[SIZE=2][/SIZE]
[SIZE=2]Oh... well chuffed with the amount of help. Thanks guys :)[/SIZE]
1 Like #31
does the CPU heatsink feel hot to touch? if so then it probably is connected correctly (as it would be conducting the heat).
1 Like #32
Rep all round then edi??? :thumbsup: :giggle:
#33
heatsink is absolutely hot to touch. CPU temp went up to 89 deg C (after the external fan in switched off) although the cooling fan is running at ~ 2600 rpm.
#34
may sound like a patronising question but... is the cpu fan spinning properly? have you turned it off / lowered RPM through bios?

sounds like the motherboard and / or CPU may have to be replaced :-(
#35
oh - you could also try turning BIOS settings to default (this will ensure that nothing is being overclocked)
#36
Looks like CPU fan is OK. Not sure how to vary the speed via BIOS ....

Bloody hell... CPU temp is showing as 94 C :?
#37
are you running any software at the moment?

I suppose there could be a virus (or something similar) which is overusing the processor thus heating it up?

what model processor is it?
#38
if your temps are reported in bios, you can discount any software problems by just watching them in the bios, sounds like a badly fitted heatsink to me though.
1 Like #39
Pentium 4 HT 3.2 GHz...

Dont have the conducting paste to refit the heatsink. Will have to wait...
#40
fungus
if your temps are reported in bios, you can discount any software problems by just watching them in the bios, sounds like a badly fitted heatsink to me though.
Yes I agree - just turn on your computer, load up bios, and leave it for a while and see what happens to the temp.

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