HP Compaq Presario,Presario V4000 Hardware And Software Manual page 105

Memory Modules
8. Insert the new memory module:
a. Align the keyed (notched) edge of the module with the
b. With the module at a 45-degree angle from the surface of
c. Press the module downward until the retention clips snap
8–4
tabbed area in the memory module slot.
the memory module compartment, press the module into
the memory module slot until it is seated 1.
into place 2.
Hardware and Software Guide