14.Replace the back panel of the computer.
Slip the back cover over the prongs at the bottom edge of the back of the computer. If your back panel was held on by screws, replace them.
sWarning: Never turn on your computer unless all of its internal and external parts are in place. Operating the computer when it is open or missing parts can be dangerous, and can damage your computer. s
15.Plug in your keyboard cable.
16.Press the main power switch on the back of the computer.
Leave the switch on so you can use the Power key on the keyboard to turn your computer on and to shut it down without having to turn it completely off.