Dell Precision 220 - Manual (Page 43)

To replace the computer cover, perform the following steps:
1. Check all cable connections, especially those that might have come loose during your work. Fold cables out of the way so that they do not
catch on the computer cover. Make sure cables are not routed over the drive cage —they will prevent the cover from closing properly.
2. Check to see that no tools or extra parts (including screws) are left inside the computer's chassis.
3. Replace the computer cover.
If your computer is a mini tower chassis, perform the following steps:
a. Face the left side of the computer and hold the cover at a slight angle as shown in Figure 4 . While aligning the top of the cover with the
top of the chassis, insert the three hooks on the cover into the three recessed slots on the computer chassis.
b. Pivot the cover down toward the bottom of the chassis and into position. With both hands, press against the bottom edge of the cover
to make sure that the securing hooks at the bottom of the cover click into place (see Figure 4 ).
c. Slide the two halves of the padlock ring together to lock the cover release mechanism.
Figure 4. Replacing the Mini Tower Computer Cover
If your computer is a desktop chassis, perform the following steps:
a. Facing the left side of the computer, hold the cover at a slight angle as shown in Figure 5 .
b. Fit the three cover hooks into the rectangular slots on the chassis. (It might be helpful to look down into the chassis to verify that
the hooks are in place.)
c. Pivot the cover down toward the back and into position. Make sure that the two securing buttons click into place.
Figure 5. Replacing the Desktop Computer Cover
1 Securing buttons (2)
1 Hook
2 Recessed slot