Power supplies can become overstressed if the computer demands more power than the supply is able to put out, which can result in power supply failure. A failing power supply should be replaced immediately to prevent system damage.

The first tip-off that your power supply is failing is likely to be unexplained computer crashes or restarts.
The main problem with diagnosing power supply failure as an issue after crashes is that many other computer errors can lead to crashes. Viruses, processor overheating, RAM issues and software driver problems can all result in crashes.

Another important symptom of computer power supply failure is excessive heat coming from the power supply.
If your computer crashes, touch the power supply or the part of the case where the power supply is located during operating to see how hot it feels. If it's very hot, there's a good chance the crash was caused by a power supply failure.

•Noise and smell can indicate power supply failure. When a power supply is severely overstressed, it may become so hot that components inside it burn. If you smell smoke or burning coming from your computer, there's a good chance the power supply is burning out. Noise can also be a key indicator, as power supplies contain cooling fans that often become more noisy or groan when the device is failing. Cooling fans within the computer case may also be more noisy when the power supply is failing.

If a power supply has suffered total failure, the computer will not be able to start up

For all of your computer questions and needs, including service and repair, call Now Micro at 800-641-3210.