Well, I am a little bit confused, but that's ok, I am confused a lot these days. Can you give us a little more info.
1. When you ran the machine with the front panel off what did you do about the door switch? How did you make it run with the door open?
2. Does the machine heat up and blow out exhaust air, but just not tumble the drum, or does it not operate at all?
3. Does the problem occur in all cycles?
4. Any problem with the belt?
Give us as much information as is relevant, including the full model number and let's see what we might have.