Airvine, I don't know what you mean when you say no power. Are you saying the switch doesn't light up, water does not come into the bowl or the toilet does not flush or all of the above? There is a connector behind the toilet that provides power and it could have come unplugged. On mine its on the left as you face the commode, to heavy gauge wires coming from the wall.
If it wont flush and the lights are on that is another issue. Just in case you have that I experience the following:
I had the same problem with my toilet, same model. It would fill but not flush and the red light (holding tank full) would come on at the switch. My holding tank was empty. I pulled the toilet out of the RV (fun job there) and the pump was plugged up with what looked like a Dryer Sheet. I had to dismantle the pump (8 screws I think) to get it out. Put the thing back together and it works fine.
So, the light on the switch does not ALWAYS indicate a full tank. The pump not working gave me the same signal.
I love this website. It has saved me a lot of money based on other RVers experience, so I always post what I discover.