Help.. I just attempted my first flight, but only one of the motors spooled up. I only get red leds lighting under the one (front left) motor that is spooling up. The other 3 just kind of went around slowly in a jerky motion, i.e appear to be in idle The motor that is working does respond to the throttle and also to the giro's, because if I pick up the Phantom (2) and wave it around, the motor power goes power level goes up and down, but the remaining 3 motors seem to be at Idle. Start-up beeps seem to indicate that all four ESC's are working OK. I'm getting flashing green leds to indicate full satellite lock for GPS flight. I've tried switching to Attitude control and this makes a difference to the one motor that is spooling up, but no difference to the other 3. Just re-calibrated the IMU, but it didn't make any difference :-( All giro readings are around +/-0.5 Acceleration readings are 0.01 0.00 -1.00 . Should the Z accelerometer be reading -1.0, does this be 1G ie normal gravity ? Compass (raw) readings also look a bit odd to me. x: 340 y: -43 z: -640 mod: 1560 (not Y and Z values are negative numbers, X is a positive number as is Mod) Are these normal values ? Thanks Roger Edit. Just did the compass calibration again (twice) and its not made any appreciable difference to the value now that I've brought the P2 back indoors and hooked it up again to the Assistant software :-( I'm contemplating taking the P2 apart and swapping over the leads from the Naza-M to the ESC's to prove that they are all OK, but it seems odd that 3 of them are idling and not completely stopped, ie the ESC's appear to be functioning in a basic way and it looks like the issue is more likely to be the Naza-m unit.