Dell 2130cn - Color Laser Printer User Manual page 120

5. Install the control board cover.
NOTE: Insert the above hinge of the control board cover into the above slit on the printer. Next, insert the below hinge of the control board cover
into the below slit on the printer.
6. Close the control board cover and turn the screw clockwise.
7. Reconnect all cables including the power cable into the back of the printer and turn on the printer.
Removing the Wireless Printer Adapter
1. Turn off the printer and unplug the power cable. Then, disconnect all cables from the back of the printer.
2. Turn the screw on the control board cover in a counter-clockwise direction and open the cover.
3. Remove the control board cover.
NOTE: Take off the below edge of the control board cover by turning the control board cover on hinge in the above edge. Next, remove the control
board cover by pulling it from the printer.