HP Pavilion dm1-4211nr Entertainment Notebook PC - Manual (Page 55)

c. Gently press the memory module (3) down, applying pressure to both the left and right
edges of the memory module, until the retention clips snap into place.
CAUTION: To prevent damage to the memory module, be sure that you do not bend the
module.
The following illustrations shows computer models equipped with two memory module
slots:
The following illustration shows computer models equipped with one memory module slot:
7. Replace the service door (see Installing a hard drive on page 36 ).
8. Replace the battery.
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