Dell Inspiron 15 (N5050, Late 2011) - Manual (Page 21)

Memory 21
4 Replace the keyboard. See "Replacing the Keyboard" on page 17.
5 Replace the battery, see "Replacing the Battery" on page 14, or connect the
AC adapter to your computer and an electrical outlet.
CAUTION: Before turning on the computer, replace all screws and ensure that no
stray screws remain inside the computer. Failure to do so may result in damage to
the computer.
6 Turn on the computer.
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