A computer power supply is a component that supplies power to the computer and provide support to the computer to perform its functions. It is one of the most vital components to operate a computer. Without it a computer is just a junk box filled up with metal and plastic.The SMPS is the device that converts the alternate current that is provided to your home to the direct current that is needed by the personal computer. In a computer the SMPS is the metal box that we find in the corner of the case of the central processing unit. It can be seen at the back of many systems since it contains a cooling fan and the power cord receptacles. The switches that the computer power supply contains actually control the flow of the volt power of the power supply to the computer.Today you can turn off your personal computer with a small button or the turn off option from the menu bar. These capabilities have been added to all the latest computers that are manufactured today. The operating system can send a signal to the power supply so that it can be turned off. It also has a circuit that supplies 5 volts even when the PC is off so that the button will keep working.It is not a big thing that cannot be replaced if in case it blows or turns down. They contribute a lot in turning the computer on and off. Trying to mess with it may cause you severe injury since it is an electrical component. There are many important measures that you should keep in mind to safeguard yourself from the blown unit. Always unplug the computer when not in use. By keeping it plugged in even if the computer is off, still there is electricity active between the PC and the wall. So, it is advised to keep it unplugged for your safety.And also when the weather is bad and there is thunder or the clouds are roaring, unplug it right away. This will keep you safe by saving your computer power supply and make an installation later if it breaks down. The computer power supply can be replaced easily, but to find it is not so easy at your local stores. The computers are upgraded after every two years, so in case you have to replace the computer power supply, you will find it difficult to an SMPS matching your old computer with the arrival of the latest technologies. The best way to replace it will be to contact the computer manufacturer. They will surely be able to find a solution to our problem. There are many online manufacturers where you will find the one that you are required. The local stores can also easily assist you with the basic requirements.Receiving enough server impact can also damage the computer power supply. That is why; investing in a power surge for the computer components can have you solve the problems quite easily. The other way through which you can safe guard your PC is that you should not leave the computer running for the whole day and avoid frequent switching the computer on and off. All the above initiatives will surely help you to run the computer power supply for much longer period.