Dell Inspiron 20 Owner's Manual page 73

11 touch-control board cable
(optional)
3 Remove the screws that secure the system board to the display-panel
base.
4 Lift the system board at an angle and release the ports on the system
board from the tab on the display-panel base.
1 screws (5)
3 system board
12 speaker cable
2 tab
73