Replacing the Cover
With the option card properly installed or removed, the last step is to replace the cover of the main unit:
1.With the back of the main unit facing you, position the cover over the computer with the side feet to the left of the main unit and the front edge pointing slightly downward.
2.Lower the cover onto the bottom half of the case, as shown in Figure
Figure
3.Secure the cover by replacing the screws on both sides of the main unit. Snap the plastic inserts into the side feet.
4.Replace the back panel and the three screws along the top edge.
5.Return the computer to its original position and reconnect it to the monitor, the keyboard, and any other peripherals you have.
6.Check to make sure the power switch is off. Reconnect the power cable to the back of the main unit and to an electrical outlet. Change the DIP switches if necessary.