3.Unlock the security lock to free the system unit cover.
4.Positioning yourself at the front of the system unit, slide the system unit cover toward you until you feel it stop.
5.Lift the cover straight up and off of the system unit (Figure
CAUTION
Many of the components on the system board and expansion boards are sensitive to static electricity. Before touching any of the com- ponents, be sure that you are discharged of static electricity by briefly touching a metal object, such as the frame of the computer.
6.Familiarize yourself with the arrange- ment of the components in the computer (see Figure
To replace the system unit cover, reverse Steps 1 through 5 of the preceding removal procedures.