HP Compaq Presario,Presario R4000 Hardware And Software Manual page 116

4. Disconnect the notebook from external power.
5. Turn the notebook upside down.
6. Remove the battery pack. (For instructions, refer to
or Removing a Battery Pack"
7. Loosen the expansion memory module compartment
screw 1, and then lift up and remove the expansion memory
module compartment cover 2.
Hardware and Software Guide
in Chapter 2, "Power.")
Memory Modules
"Inserting
8–3