Users can typically install or replace power supplies in desktops that use standard parts without expert guidance. Laptops and other devices that use proprietary elements, however, might require installation by someone with expertise in the process.
Power supplies in standard desktops are designed for users to install and replace. Installation typically entails placing the power supply in the case's designated area, which is often near the top. Screw the power supply into place. After installing the motherboard and other components, use the cables from the power supply to power the motherboard and disk drives. Graphics cards and optical drives typically need a cable as well. When replacing a power supply, consider taking a picture while everything is still connected to the old power supply first to make installing the new one easier.