Why Did My Power to My Computer Stop Abruptly?

Troubleshooting computer problems can be very frustrating, and in that frustration, even simple commonsense solutions can easily be overlooked. One of the best approaches to troubleshooting is the process of elimination. This article assumes that your PC tower is without power, and it is not a problem with your monitor.

Check the Power Source

When your computer suddenly loses power, it could be caused by a range of problems, from a loose cord to a faulty piece of hardware, and is best approached from the wall out. The first thing you should do is look around. Did you lose power anywhere else in the building? If not, check the outlet. Can you power anything else, such as a lamp or a radio, from it? If not, then the problem may be solved by checking the breaker box, or checking to see that a wall switch didn't get flipped by accident. If the problem isn't with the outlet itself, then make sure that the power cord to your PC or power strip is securely plugged into the outlet.

Going Down the Line

If you are using a power strip, make sure that all other cords are securely plugged into it and that there is power actually coming out of each plug in the strip. (Again, a lamp or radio works well for this). If there isn't, than check for a reset button on the power strip itself. If there is power there, then check to make sure the end of the cord that goes into your computer is secure.

Possible Hardware Problem?

So now you know you have electricity up to a point. If possible, try using another power cord from the outlet or strip to your computer. If this still fails, then it is possible that the breaker in the power supply unit (PSU) inside your computer may have tripped. To check this, unplug the power cord from the back of your computer. Near where it plugs in, you should see a little red tab. Flip it completely in the other direction, wait a few seconds, then flip it back. Hold down the power button on your computer for about 30 seconds (with the computer still unplugged) to flush out the power supply. Plug the power cord back in and try to turn on your computer. Look for a little LED light to come on in the back of your computer. If it still does not work, then your PSU may have died and may need to be replaced. Another possibility is that the power button (or attached internal switch) on the computer may have gotten stuck in the "off" position.

References

• Further helpful troubleshooting