HP dx2200 - Microtower PC Service & Reference Manual page 49

Removal and Replacement Procedures— Microtower (MT) Chassis
5. Push the module down into the socket, ensuring that the module is fully inserted and
properly seated. Make sure the latches are in the closed position 3.
6. Repeat steps 4 and 5 for any additional modules that you want to install.
To reassemble the computer, reverse the removal procedure.
Service Reference Guide, dx2200 MT 415606-001 6–7