Power supply is found on every personal computer. It is device where power is received from the alternating current and converted to direct current that is useable by the computer. It is located inside the CPU distinguished by cooling fan and the power-cord receptacle.

Since the power supply receives the first surge of alternating current, it heats fast when used and cools down when the computer is shut down. The heat produced by electric surge can cause the components to overheat more frequently than other parts of the CPU. As the consequence, the power supply is the particular part that is most prone to failure.

One most common symptoms of power supply failure is the inability of power to come on. Several reasons might cause this to happen. The first thing you should do is to check whether the socket has power. To do this, all you have to do is to unplug your computer and try other plug. It can be a radio or a lamp. If the radio or the lamp work, then you have to check whether your computer plug is already busted. This might be a rare circumstance but it is probable to happen.

Another thing worth checking is the voltage setting. At the back of the CPU where the power supply is visible, you can surely locate the voltage selector. Check if it is on the right setting, which is 220v. On a 110v country, set the power supply to 110V.

If in case the power comes on but there is no live screen, you may try shutting down the computer again. Booting for at least two times would make the power supply to stabilize. Usually, this happens when the motherboard demands more timing from the current power supply.

But if you have done this for several times and there is no sign of live screen, it is more likely that the motherboard protects itself. Don