PC keeps turning off??

amboy

For the past month now my pc has been turning off after approx 30 - 40 minutes working, I initially thought it was blowing the plug top fuse due to the fact that when I turned the power button on the pc ON it wouldnt do anything, after I got round to changing the plug top fuse it would work again for about the same length of time.

i had previously hadf the power supply and fan changed as their was seemingly a different problem before and this sorted things for 3 or 4 months.

Anyway, now I have just discovered that it is not the plug top fuse that is blowing, but by leaving the PC for a while and repeatedly pressingf the power button it will power back on.

Any help much appreciated.

skim

is it overheating?

take the lid off & have a look if the fan/heatsink on the CPU is clogged up with dust

Little_John

It does sound like a heat issue. get an air duster from tesco about £4 and give it a blast to remove any dust inside. with the hot weather this last week or so a clogged PC is running hotter than normall so may shut down to save itself from cooking.

ixwood

Yeah, sounds like it's overheating.

amboy

The person who changed the fan and power supply thought this when he came round last week and took cover off and had a look for dust etc, after he left it worked ok, it was a little slower however.

I left it running for a few days then noticed it had turned off. so now back to about 30 or 40 minutes working.

I will give the inside another look at.

richyrichuk

if u want a full insite to the problem. list full specs and a pic of the side of ur pc..because not very much dust to yourself, might be a lot in computer terms

PZH

Do you have a Motherboard monitor program to display the temperatures ?

If not, try Speedfan - this shows temps, voltages and other readings from the system.

http://www.almico.com/sfdownload.php

This way, you should see if temperature is a problem.

Little_John

It isnt always the processor fan hat is the problem, normally if the cpu overheats you get an alarm to tell you. When its the power supply they just go off.

next time it happens put your have on the PSU at the back where your power cable goes in and see if it feels warm or hot. if you have speed control on the psu (some have) invrease the speed and again give it a blast with the air duster. You will be supprised at how much dust comes out of there. if after cleaning it still shuts down then you need a new one, I wouldnt go swapping fans in the PSU.

PZH

Hi Little John

Whilst I tend to agree that the system should give you warning before shutting down - this would depend on if the alarm is enabled in the BIOS ( Some let you turn off the warnings ! ). If it isn't enabled, or if set to "ignore", then the threshold could be reached and the system simply shut itself off.

However, even if it is the PSU, Speedfan still shows voltage levels which maybe fluctuating due to the heat or failing of the PSU, as well as the overall system temp ( inside the case ) and may give some indication to the cause of the problem.