Dell Vostro 220 (Late 2008) - Manual (Page 120)

120
System Board
b Remove the memory modules from the system board (see "Replacing
or Adding a Memory Module" on page 104) and place them
individually into antistatic packaging.
c Remove the processor from the system board (see "Removing the
Processor" on page 125) and place it into antistatic packaging.
9 Disconnect the chassis fan cable from the system board.
10 Disconnect any additional cables from the system board.
11 Remove the screws that secure the system board to the computer chassis.
CAUTION:
The system board is extremely fragile. Exercise great care when
handling the system board.
12 Carefully lift the system board out of the computer chassis and place it
into antistatic packaging.