Computer turns off after awhile

I will try it once I get my hands on another PSU.

What kind of PSU should I get?
 
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I'd invest in a can of air before spending money on a PSU. There's dust everywhere and your PSU looks downright furry on the fan grate.

PSU probably isn't of the greatest quality, but it's got enough overhead I wouldn't make that my first guess.
 
Darren said:
I'd invest in a can of air before spending money on a PSU. There's dust everywhere and your PSU looks downright furry on the fan grate.

PSU probably isn't of the greatest quality, but it's got enough overhead I wouldn't make that my first guess.
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I have seen couple of machines with same type PSU, both had random shotdown problem. Both had PSU capacitors leaked. It may be something else but...

S1Eugene said:
I can try that first but isn't compressed air bad for the environment?
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I don't think small bottle of compressed air makes pollution aspect relevant.
 
Now my computer is fixed, I do not know what the problem is but it should be something wrong with the PSU as my uncle change the PSU and replaced it with one from Corsair. I have another problem now which is my monitor goes black at times and shows the 'No Signal' message then it goes black. It comes back after awhile but I do not know if it always comes back as I sometimes just turn off and on my computer by holding down the power button. Any help?
 
S1Eugene said:
I sometimes just turn off and on my computer by holding down the power button.
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You DON'T turn off your pc by just pressing and holding the power button, that will cause you problems by killing your hard drive. There is a shutdown sequence to do when shutting your system off.

As far as the monitor going black is concerned, either you have a bad or loose video cable or something is up with the video card.
 
johnb35 said:
You DON'T turn off your pc by just pressing and holding the power button, that will cause you problems by killing your hard drive. There is a shutdown sequence to do when shutting your system off.

As far as the monitor going black is concerned, either you have a bad or loose video cable or something is up with the video card.
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I am guessing my video card has problems as the cable doesn't seem loose. How should I shutdown my PC?
 
S1Eugene said:
How should I shutdown my PC?
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What operating system are you running? To shut down your pc, you need to click on start then shutdown. But depending on if you have windows 8,8.1, or 10 process could be a little different.
 
johnb35 said:
What operating system are you running? To shut down your pc, you need to click on start then shutdown. But depending on if you have windows 8,8.1, or 10 process could be a little different.
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I am currently running windows 7 and I know how to shutdown my pc but I press the power button when the screen is black as I cannot click on start then shutdown. Now my pc freezes occasionally and when I press caps lock or any button on my keyboard, the light doesn't turn on or off. How do I fix that problem? Or is it time for a new pc?
 
What I would do is build the motherboard outside of the case on a piece of cardboard to verify there is nothing shorting out. This could be a short in a usb port or motherboard shorting out against the case where there is no standoff installed or something else.
 
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