The Color Scan button does not light up when depressed nor does the one to it's left and the row directly underneath it. I have a 161 left panel (the left panel detaches from the main panel) and I swapped it but it does not work either, although the other buttons do, so I am assuming it is not the left panel. The main control panel I could not swap out because they changed the connector ever so slightly and the cable from the machine will not fit into it. Has anyone seen this before? Could it be the main panel or am I looking at a board in the back? I check all connections in the back and they are tight, even in the NIC panel.