- 1). Attach the power cables. The power cable is usually a black or dark gray color, and one end plugs into the wall outlet. Attach one end to the wall outlet and the other end into the back of the computer. The computer monitor will have a similar power cord to be attached.
- 2). Insert the monitor cables. A monitor cable is a VGA cable that has several pins in it and is attached to the monitor on one end. Insert the cable in the VGA input in the back of the computer, attach it near the bottom to the GPU (graphics card). If you don't have a graphics card installed, attach it to the default motherboard position.
- 3). Attach cables for input and output devices. The mouse and keyboard are important to plug in before you turn the computer on, and on modern computers they attach simply into USB ports in the back of the computer. These are USB 2.0 cables that allow for quick transmission of data.
- 4). Attach cables for the speakers. Depending on what brand of computer speakers you have, you may have a different number of speaker cables. The speaker cables are color coded to match the corresponding ports on the back of your PC.
- 5). Attach a cable to plug into the Internet. This is an ethernet cable, and connected on the other end, usually to a router. Power on your computer, and plug in the ethernet cable. LED lights around the cable should blink green if you've plugged it into the right slot.
- 6). Attach the cables for the printer. Printer cables are usually high-speed USB 2.0 cables, but these cables have a square connector on one end. The printer will plug into any USB port in the back of the computer.
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