Computer randomly turns itself off

Hi, I am new to this website so I am not sure whether this is the correct forum to post this thread; but here goes.

I recently tried to install some new RAM into my computer and noticed a problem; basically it wouldn't work at all. So after doing a bit of research I found out that it wasn't the right type for my computer. So I removed it. ]

Everything seemed fine until about 2 days later when my computer turned off randomly, without me shutting it down. I thought it could be the computer overheating so I lifted of the shell and cooled it for a bit. Not the problem, even without the shell on it still turns off. I have changed my PSU cable and still not working.

I have a Fujitsu Scaleo P. Any suggestions?

Have you done antivirus and antispyware scans recently, they can cause your pc to turn off.

reseat your memory and read the sticky about installing memory.

also always ensure you're grounded when messing around with the innards.

I havn't done any antivirus scans or anything to do with my antivirus apart from a 2 weekly scan which hasn't taken place yet.

How do I reset memory exactly?

edit: I didn't mention, after it turns off, it won't turn back on straight away, I usually have to wait about 1 minute; if I try turning it on after a few seconds after it has 'mysteriously' turned off, it works for a few seconds and turns straight back off.

I very much doubt memory has anything to do with your problem, virus and spy ware scanning is something that should be done on a very regular basis, my pc gets scanned for both every night for example.

From your last post, it may well be overheating or a psu fault. Get speedfan from the downloads section of this site and it will measure temperatures and voltages for you.

If it comes up with anything out of the ordinary then post the results and we will see what can be done to help.

RESEAT. not reset.

I conducted an 'experiment' yesterday, and left my computer on while I was at work. (for 8 hours)

When I came back home, lo and behold, my computer was sitting there, playing my extremely annoying Spongebob screensaver; and all was well.

I thought I had overcome the problem but, no sooner had I loaded up World of Warcraft, 20 minutes later; computer turns off...

Maybe it's something to do with running the World of Warcraft application?
It couldn't be a coincidence as before it has turned off roughly every 30 minutes to an hour.

cpu temprature is maybe too high. or a hardware failsafe problem.

clean out your case with compressed air
check with a program like speedfan, or everest home and go to the sensor section, tell us what you see there (voltages, temps etc), also in bios hardware monitor (when you boot up go into setup on the first screen)

Ok, I may have a problem

I downloaded 'Speedfan' and, I have a list now of different temperatures, currently a few of them are between 20-45C, but one (fan 2, or temp2) is 102C!!! It has an icon of a flame next to it.

I'm a bit worried >_>

WHOLLY MOLEY! You need to replace what you are using to cool your CPU ASAP!!! That is definitely the CPU unless there is something else in your computer that can set it to 102C. If it's the CPU your computer is shutting down due to overheating. I'm surprised that your CPU hasn't melt down because of that. Still, it could be a misprint.

LOL,

Well, i've had a suggestion by a friend to hoover my fans out. I've set my desired temperature on that particular fan to 35C, and it's slowly cooling, it's gone down to about 90C.

Think I need to get a new fan?

damn right you need a new fan..90C is just too high...it needs to be under 60.

It needs to be under 40 based on what it is experiencing. ANYTHING above 50 is a problem. You need a fan that brings it down to 30-35. That is how you maintain a healthy CPU.

yes i second that to... i also recomend having another app like everest home to compare the temp reads to determine your actual temps. i'm supprised your failsafe shutdown didnt occur earlier (70`C) as per standard mobo setting.. if needed, go for some new heatsinks and arctic silver...

things that create heat: vid cards, hdds, cpu, ambient case temps, psu's, bad airflow....

Hi, I have fixed it:

Here's the problem. My fan was filled up with 2 inches of DUST!!!

Holy crap i've never seen anything like it before, i'll post pics in a new thread that i'll post as a kind of guide to anyone expirienceing the same problem.

my computer always stays near teh 20degree mark can having it too cold be bad? and at wat point is it too cold

Thats fine, you can never overcool a pc in my opinion.

your temp readings are out of whack.

If it heated up to over 100c and kept running, then you would have a melted CPU

Also, 20c on a stock cooler just doesn't happen. even high end air coolers don't bring temps down to 20c. Even if that temp was true, no it isn't too cold.

The good thing about those temp readings however... is that you saw an instant change in temps from simply cleaning the heat sink fins. dust accumilation is a common problem and an easy fix.

anywho.. glad you fixed it..

power box atx 400w SPI. fan (LP4/TX3) 8*8*2.5 and im in canada in my basement so it might explain some of it its like 15 defress down here

my readings are always between 20-25

this may also be a power supply problem it may have been a coincedence when you installed the RAM to temporarly fix this in windows XP go to contol panel and click performance and maintinece, click system, click advanced on the tabs at the top and the last option click it, and uncheck "automatic restart on system failure" this is only a temporary fix if it is a PS issue, if that is the case it will need to be replaced