HP Compaq NC4010 Maintenance And Service Manual page 100

Removal and Replacement Procedures
5. Spread the two retaining tabs 1 that secure the memory
module to the memory module socket. (The module rises up).
6. Remove the memory module by pulling it away from the
memory module socket at a 45-degree angle 2.
Removing a Memory Module
Reverse the above procedure to install a memory module.
5–12 Maintenance and Service Guide