PC shuting down for no visible reason

[Guest]

My PC has just recently started to shut itself off for no visible reason. My
CPU fan is working correctly. I can't find any viruses. One weird thing is
that when I try to get into my Bios settings while my PC is booting up, my
keyboard won't respond so I can't get into it. My keyboard will start
responding when that particular start up sceen goes away. Is this a
operating system problem, and is there anything I can do to fix it.

 

[D.Currie]

My PC has just recently started to shut itself off for no visible reason.
My
CPU fan is working correctly. I can't find any viruses. One weird thing
is
that when I try to get into my Bios settings while my PC is booting up, my
keyboard won't respond so I can't get into it. My keyboard will start
responding when that particular start up sceen goes away. Is this a
operating system problem, and is there anything I can do to fix it.

If you can't get into the bios, that's not an OS problem because you haven't
gotten to the OS yet. It might be as simple as you having a USB keyboard,
and that function isn't turned on in the bios. If that's the case, try a
standard keyboard.

As far as suddenly shutting off, you can look in the event viewer and see if
there is anything listed at the time the computer shuts off. If so, that's a
clue to the problem.

If there's nothing in the event viewer, the problem is more likely to be a
hardware issue. Most common is an overheating problem. Just because the fan
is spinning, it doesn't mean it's spinning fast enough or that there isn't
dust clogging the heatsink fins. The fan may be shutting off after a while
and you don't notice it, or a cable could be blocking airflow, so you're
just moving hot air around.

Or it could be a different component overheating.

Or it could be some other part failing. I had a hard drive going bad, and it
would shut the computer down.

 

[Guest]

Thank you guys for the tips. I actually think I might have solved the
problem. I recently purchased a new power supply about 13 days ago. I just
took that out today and put in the previous one I had. So far it is working
fine. I'm still going to try what you suggested to see if anything else is
causing it. But as far as I can tell now, the new power supply I had went
bad.