Definitely an open circuit...
I think Greg is exactly correct. It's most likely a switch issue. The question is, which switch? I would definitely look first at the main power switch. Once you get the machine taken apart, you'll be better able to judge the action of the switch than when it's under the rocker, which is just a plastic cover. Also test the switch with a volt-ohm meter (aka multitester) to confirm it's working properly. If that's okay, the next possible culprit would be the bag eject lockout switch, whic is what kicks the bag door open when the bag is full. I'm assuming your machine is equipped with one. Full disclosure here, I have never used one of the later plastic canisters, much less taken one apart.
On the older style metal canisters, this switch is located inside the bag door. You have to take the bag door apart by opening it and removing a few screws. When I first got my Super J, it wouldn't work but the main power switch felt healthy with a definite click back and forth. When I disassembled the bag door, the lockout switch had definite issues. There were a couple of burnt contacts with the plastic melted around them and the damage didn't appear to be new. Interestingly, there was an extra contact adjacent to the blue wire that would allow you to bypass the lockout switch by moving the black wire there. I didn't try it; I just ordered a new lockout switch. Once that was in place, all was right with the world--or at least with that Super J.
Be sure also to check the cord and plug and let us know how things turn out. I'm reasonably certain the machine is fixable.