An external power supply is necessary to run a computer.
External power supplies are small boxes with a fan, two black plug holes and various cables with several colors that you can attach to the motherboard. The motherboard is a large green plastic plate with wires and chips that run calculations while you are using your computer. The motherboard needs an external power supply to operate correctly, and this is why you need to attach a power supply to your motherboard. Attaching an external power supply to your motherboard is a straightforward process and you do not need expert help to do it.
Instructions
1. Remove the cover of the computer case using a screwdriver. You can find the screws at the back or base of the computer.
2. Check that the motherboard is correctly aligned and that it is in place inside your computer case. If not, align it onto the pegs or standoffs and screw it onto the computer case. Take care when screwing because if you screw the motherboard too firmly, it may crack.
3. Check that the power supply is in the correct place. The power supply is a grey box with red, yellow and black cables coming out of it. It should be at the back of the computer above the motherboard.
4. Grab the colored cables and plug them into the motherboard. Ensure that the you plug the cables into the motherboard firmly because if they are lose, it may destroy the motherboard. The power supply cables have different shaped and sized plugs that only go into one hole on the motherboard to help you orientate the cables correctly.
5. Plug the black cable that came with your computer into the grey power supply box. You need to plug the end of the cable that has a small square plug with three teeth. Plug the other end of the cable into the main electricity supply plug in the wall.
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