Dougmeister

We have an original 2600 (light sixer) and the channel selector button came off inside the unit. I opened up the case and looked at the plastic switch. There was no metal on it anywhere. I snapped it back on and it moves normally, but nothing happens when the console is on. I suspect a small piece of metal or something also fell out and has been lost? Something that would make contact with the soldered places...? Can anyone provide pictures of what it *should* look like (bottom side of the plastic switch), etc.? Is it possible to buy a replacement switch?