HP Compaq nx8220 Maintenance And Service Manual page 100

Removal and Replacement Procedures
6. Spread the retaining tabs 1 on each side of the memory
module socket to release the memory module. (The side of
the module opposite the socket rises away from the
notebook.)
7. Slide the module away from the socket at an angle 2.
8. Remove the memory module board.
✎
Note that memory modules are slotted 3 to prevent incorrect
installation into the memory module socket.
Removing the External Memory Module
Reverse the above procedure to install an external memory
module.
5–14 Maintenance and Service Guide