Computer shutting down

it sounds like your motherboard is shutting itself off to protect itself from overheating or some other system failure. you should verify all your fans are running at the correct speed. if it seems like everything is running fine, you can probably turn that off in bios. obviously if there is something wrong with the fans, then you need to replace them. Another options is maybe the processor is getting too hot which is why it's shutting down. open the case and remove the heat sync from the board so you can see the processor. clean the thermal paste off the processor and apply a new generous layer. put the heat sync back on and then try and restart. make sure before you do ANY of this you unplug the computer! good luck and let me know if it works!

It sounds like it could be a problem with overheating, which is causing the machine to turn itself off. Try opening the side cover, and carefully cleaning the motherboard and especially the CPU fan - which is the large fan probably on top of a silver box with loads of fins on it. Carefully remove the dust, and see if this clears up the problem. It may be worth removing and refitting the memory whilst the computer is open, to reduce the problems of bad connections between the cards.

If it doesn't fix it, then reply here with any error messages that pop up on the screen.

The way you describe the problem, with the fan getting noticeably louder then shutting the computer down entirely, sounds like an overheating issue; the fan spins up to top speed to try and cool the system down, fails to do so, and the machine shuts itself down as a safety precaution.

Propping it up might have provided it with a bit more airflow, which may be why you experience the shut downs a little less frequently. I would invest in a can of compressed air, which can be found at any office supply store, and blow out the exhaust vents on your laptop. If you've never cleaned your machine before, dust and other debris that accumulates in the vents and around the fan have probably built up enough to restrict air flow.

Your Dell OptiPlex GX260 PC Desktop computer is overheating. It is shutting itself down to prevent component failure.

Ensure that the Processor heat sink is clean of dust so sufficient air can flow through the heatsink and cool the processor.

Install additional fans in your computer 120mm are best but 80mm fans will do fine.

Clean the computer chassis of dust as well.

Thanking you
damnor01

It sounds like it is getting hot. Go buy an Under Cooler at Best Buy for abt $20 and try that

I am sure you mean it is SHUTTING down.
This usually an overheating problem.
Open up the computer and clean out the fans, if you google cleaning my computer, there are lots of guides and youtube video's

Indications of laptop overheating problem:

1. The keyboard and the bottom of your laptop are very hot when the laptop is working.
2. The CPU fans are working all the time at maximum rotation speed and operate much louder than before.
3. The laptop suddenly shuts down by itself without warning. When it just started, the laptop was shutting down after 1-2 hours and how it shuts down after 5-10 minutes of operation.
4. The laptop works fine when it runs idle, but shuts down as soon as you start using any memory demanding applications (DVD player, image editing software, video editing software, etc.).

Solution:
If the CPU heatsink is not clogged with dust and lint completely, you can use canned air and just blow it inside the laptop through the openings on the bottom and on the sides. It’s nice as a precaution measure, but it might not work if your laptop already has a problem and the heatsink is completely clogged.

1. Open the laptop case, so you can access the CPU fan and the heatsink. In some cases you can access the heatsink through the latch on the bottom of the laptop. Sometimes (for example Toshiba Satellite A70/A75) you have to open the laptop case all the way down.
2. Carefully disconnect the fan cables on the system board and remove the fan. If the fan makes unusual sound when it spins (grinding sound), I would recommend to replace the fan.
3. Clean the fan and the heatsink with compressed air.
4. I would also recommend removing old thermal grease from the CPU and applying new grease for better heat conductivity.

Your fan has failed! Your cooler not working properly, clean your cpu-fan. Your CPU is over-loading temperature is too high without an working fan! This is your Problem!

Classic case of overheating.

Turn over notebook and remove bottom covers. clean out heatsinks near the fan.


The fan usually looks very clean, but look inside the fan housing and you'll probably find a blanket of lint/dust completely blocking the air passageways (even if they look clean from the outside).

If you remove the heatsink off the chips make sure you put on new thermal paste.

Some models it is very easy to get to the fans, others you have to fully disassemble the notebook

You could also try cleaning it out from the outside with an aircompressor, just leave it off for a day in case the is any moisture in the aircompressor lines. This may fix it but if its really clogged, you will need to open the unit and manually clean it.

HTH
JoshAU

Please Check CPU making any noise or not.

remove the CPU side door and check Fan is rotating on Processor if not it may not rotate due to heavy dust inside. ( clean it and refix it)

Check SMPS Fan is rotating or not..

If fans or not rotating Heat Builds up then computer shuts down itself.

If both fans are working...Just Open BIOS window by press DEL button continuosly while startup and wait for 2 to 3 minutes If the computer shuts down Itself in BIOS Window also then we can confirm issue with Hardware.

If Computer not shutting down in BIOS Window then issue with Operating System Boot files corrupted.

While Turn ON the system press F8 to enter in Safe Mode.

Open command prompt by clicking on

Start >. RUN >> type cmd >> then press enter.

now type chkdsk /f

now press Y

then reboot PC it fixes the Boot files error then your PC works perfectly.

If you still exp same issue let meknow..