Dell Inspiron 14 (3420, Mid 2012) - Manual (Page 71)

8 Replace the optical drive. See "Replacing the Optical Drive" on page 24.
9 Follow the instructions from step 3 to step 7 in "Replacing the Palm-Rest
Assembly" on page 28.
10 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.
Camera Module 71