Dell Inspiron 13z (N311z, Mid 2011) - Manual (Page 73)

I/O Board 73
6 Replace the palm rest assembly. See "Replacing the Palm-Rest Assembly"
on page 32.
7 Replace the keyboard. See "Replacing the Keyboard" on page 27.
8 Replace the hard drive assembly. See "Replacing the Hard-Drive Assembly"
on page 23.
9 Replace the memory modules. See "Replacing the Memory Module(s)" on
page 18.
10 Replace the module cover. See "Replacing the Module Cover" on page 16.
11 Replace the battery. See "Replacing the Battery" on page 14.
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.