Dell OptiPlex 3020M Owner's Manual page 31

a) cover
b) processor fan module
c) hard drive
d) heatsink
e) memory
f) processor
g) PS2 or serial connector board
h) WLAN card
i) coin-cell battery
3. Perform the following steps as shown in the illustration.
a) Remove the screws that secure the hard-drive holder to the system board [1].
b) Lift the hard drive holder away from the system board [2].
4. Perform the following steps as shown in the illustration.
a) Remove the screws that secure the system board to the computer [1].
b) Slide the system board to release it from the computer [2,3].
c) Lift the system board away from the computer [4].
Extracción e instalación de componentes 31