I have a problem with my Phantom (1?); after satellites have been found I get a rapid green light burst, then slow, steady yellow flashes thereafter. If I go ahead and start the rotors and fly, it drifts to the left. All actions seem correct from the controller, but it drifts away with no movement of the controller. I don’t seem to be able to get any response from the compass calibration steps. My unit is model P330 and the S/N isPH635534843. What unit do I have and what can I do for it? I tried to do the advanced calibration, I get a warning that BTU is too high, switch off and cool down for 5-10 minutes; but I am in an air conditions room at 75°f. Please help and/or advise where to go next. I just got this unit from my co-worker before he left this position in our department. my experience is one flight under his tutelage.