HP ProBook 6550b Maintenance And Service Manual page 87

CAUTION:
To prevent damage to the memory module, hold it by the edges only. Do not touch
the components on the memory module.
6. Grasp the edge of the memory module (2), and then pull it out of the memory module slot.
NOTE: Memory modules are designed with a notch (3) to prevent incorrect insertion into the
memory module slot.
Reverse this procedure to install the expansion memory module.
Component replacement procedures 79