Dell 2130cn - Color Laser Printer User Manual page 174

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.
4. With the connector of the memory toward the slot, insert the memory vertically into the slot.
5. Push the memory into the slot firmly.
NOTE: Ensure that the memory is firmly fixed in the slot and cannot be moved easily.
6. 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.