Help! My Eachine 250 racer stopped working one day after I had been playing with my rates. I went back in and tried to go through the setup wizard again, including a firmware update, and when I got to the Output Calibration page, the motors never responded when I moved the sliders up. Maybe worth noting, when I do the ESC calibration, I get a good wobble from the two motors on the right of the quad, but only a slight vibration from the two on the left.
Any clue what might be wrong?