I recently had an indoor crash (thought I could PREVIEW a set of waypoints, pressed GO and it took off in my apartment!) anyway it got stuck wide open in a corner until I finally shut down the battery. Two nicked props but no other apparent damage. I went to test it (Props off!) and it wont fire up. I have relinkedthe controller, swapped batteries, checked the calibration with the Assistant (seems to worked fine but I keep getting popup "calibration error"). Everything looks fine but motors wont start. Two other symptoms: I can't get the compass calibration to work, and after initial flashing of all 4 LEDs, only the two GPS LEDs stay lit- slow flashing green. I am wondering if the crash caused something.