HP Compaq Series Hardware Manual page 97

Hardware Upgrades
4. Press in on the latch 1 to release the memory slot cover 2,
then tilt it up and remove it from the notebook.
If you are replacing the existing memory in the primary
memory slot, you must remove any memory in the memory
expansion slot first. Proceed to step 5.
If you are adding memory to the memory expansion slot, see
"Adding a Memory Module" later in this chapter.
Hardware Guide 8–10