ECO board The ECO board is located on the lower left side of the rear of the printer, below the controller board, on HP Color LaserJet GN printer models. 1 Remove the rear cover (see page 243). 2 Remove the formatter board and formatter pan (see page 254 and page 272). 3 Unplug the ECO board connector (callout 1). 2 2 2 1 Figure 130. ECO board 4 Remove two screws (callout 2) to release the ECO board. Note You might have to also pinch the plastic tabs on the right side of the ECO board to remove the board. EN Rear assemblies 279