Dell Dimension 4550 - Manual (Page 81)

Adding Parts 81
5 Lift both hinge arms to the horizontal position.
6 Use the two view slots to align the pivot bar with the two pivot-bar
slots.
NOTICE: Before touching anything inside your computer, ground yourself by
touching an unpainted metal surface, such as the metal at the back of the
computer. While you work, periodically touch an unpainted metal surface to
dissipate any static electricity that could harm internal components.
7 Pull the arms toward you until they snap into position.
If the hinge arms do not snap back into position on the first attempt,
slightly reposition the arms and try again.
8 After the hinge arms snap into position, lower and raise the arms two
or three times to properly seat them.
9 Reattach the front-panel insert.
hinge arms in
horizontal
position
pivot bar
view slots (2)
pivot-bar slots (2)