Dell S3220DGF Simplified Service Manual page 9

S5.Remove main
board and power
board
9
Remove the Mylar.
Use a Philips-head
screwdriver to remove 4
screws for unlocking the
main board and the
adapter board
(No.1~8 screw size=D3x6,
Torque: 6±1kgf.cm)
(No.9 screw size=M4x6,
Torque: 6±1kgf.cm)
Disconnect all of the
cables