Dell PP29L Owner's Manual page 119

NOTICE:
If the cover is difficult to close, remove the module and reinstall it. Forcing
the cover to close may damage your computer.
3 Replace the memory module cover.
4 Insert the battery into the battery bay, or connect the AC adapter to your
computer and an electrical outlet.
5 Turn on the computer.
As the computer boots, it detects the additional memory and automatically
updates the system configuration information.
Confirm the amount of memory installed in the computer:
• Right-click the My Computer icon on your desktop, then click
Properties→ General.
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Adding and Replacing Parts
119