HP Compaq Presario,Presario R4000 Maintenance And Service Manual page 122

Removal and Replacement Procedures
4. 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.)
5. Slide the module away from the socket at an angle 2.
6. Remove the memory module.
✎
Memory modules include security slots 3 to prevent the
incorrect installation of the module into the memory module
socket.
Removing the Memory Module
Reverse the above procedure to install a memory module.
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