Dell Inspiron 14z (N411z, Late 2011) - Manual (Page 85)

Media-Card Reader Board 85
6 Replace the keyboard. See "Replacing the Keyboard" on page 33.
7 Follow the instructions from step 5 to step 6 in "Replacing the Optical
Drive" on page 25.
8 Replace the module cover. See "Replacing the Module Cover" on page 16.
9 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.