HP Compaq Presario,Presario R4000 Maintenance And Service Manual page 103

5. 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.)
6. Slide the module 2 away from the socket at an angle.
7. Remove the memory module.
✎
Memory modules are designed with notches 3 to prevent
incorrect installation of the module into the memory module
socket.
Removing the Memory Module
Reverse the above procedure to install a memory module.
Maintenance and Service Guide
Removal and Replacement Procedures
5–13