HP Pavilion DV5-2070 User Manual page 87

NOTE:
primary memory module, replace the memory module in the expansion memory module slot.
12. Close the cover (2).
13. Tighten the memory/wireless module compartment cover screw (3).
14. Replace the battery.
15. Turn the computer right-side up, and then reconnect external power and external devices.
16. Turn on the computer.
ENWW
If you removed a memory module from the expansion memory slot before removing the
Adding or replacing memory modules 77