Fixing a computer may seem like a complicated process that can also be expensive. However, most repairs done to dekstops and laptops involve replacing some important components on the motherboard. Some common hardware parts that are often replaced include RAM modules. Cooling fans, power box, and electrical wires may also be replaced to improve the performance of a PC or MAC. In fact, problems with USB ports and hard drives of a computer may related to faulty electrical wiring on the motherboard.