Without the PC power supply unit (PSU), your computer is useless. The power running through your home is an alternating current (more commonly known as 'AC'). Your computer needs a direct current (known as 'DC') in order to run. The switcher technologies within the power-supplies are responsible for directing and converting the currents. Lacking that little box full of inventive technology, your computer would not turn on.
Before the advent of the current PC power supply, turning on a computer meant the use of humongous capacitors and transformers. The applied science of modern times has much reduced the bulk of the former components needed while still fulfilling the targeted demand. Because this component has to go through the cycles of heating and cooling each and every time the computer is turned on and used, it happens to be one of the more likely parts to malfunction or even completely fail.
When you have a PSU failure, you will want to purchase a new one. However, what do you look for? Can you replace it yourself? What will it cost? These are all some common questions that will arise in this situation.
First of all, you need to know the wattage requirements of your computer. To find this information, you will want to add up the requirements listed on the labels of the individual computer components. You will also need to know the type of form factor your computer uses. A lot of newer computers use the Advanced Technology Extended (or ATX) form factor, older PC's may use the AT form factor. There are also a couple of other varieties. Be sure you know which you need before you start shopping. The PC power supply is fairly simple to replace. Always make sure your computer is unplugged from the wall socket before attempting to replace a part. If you are unsure or uncomfortable with taking your computer apart, you can have this done by a professional technician. The cost of your PSU is going to vary depend on all of the factors listed above. The prices will also vary from brand to brand, company to company.
You can find a PC power supply at nearly any computer store either locally or online. Most brick and mortar stores will have a technician or customer service rep that can help you decide which PSU is right for your computer. An Internet retailer will typically have a guided search function, a frequently asked questions section or the ability to instant message a customer tech in case of questions or problems with your purchase.
The PC power supply is essentially the heart of your computer, the same way that the motherboard is essentially the brain. Without either of these two fundamentals, you have nothing other than a box of wires and metal. These are the things that keep your computer running. If you think that your PSU is responsible for any sort of problems or malfunctions that you are having with your computer then it is time to start shopping around for a new one.