Dell Inspiron 14z (1470, Mid 2009) - Manual (Page 89)

Speakers 89
7 Follow the instructions in step 3 to step 16 in "Replacing the System
Board" on page 75.
8 Follow the instructions from step 5 to step 6 in "Replacing the Optical
Drive" on page 25.
9 Replace the module cover. See "Replacing the Module Cover" on page 16.
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.