Hi Folks Newbie here so bare with me. I just had the fc40 plugged into the pc on the latest Naza assistant, it notified me that I needed an firmware update from v4.02 to v4.06 so I clicked update, it started and about 30%-50% into the update it then failed. the fc40 now just beeps, i powered down everything, rebooted all while still hooked up and still it beeps, also I disconnected from the computer powered up the quad as normal and still just beeps. I got this error message; CFG-ERR##Configuration error, this may be caused by firmware upgrade from the old version, or abnormal Tx calibration. Re-calibrate your transmitter, power cycle your controller, and check all of the parameters) how do i recalibrate tx, how to power cycle controller and check these parameters ? anyone any ideas or help is much appreciated. Just going to add that for quite expensive machines Dji seem really poor in there support, The only support seems to be in forums or youtube vids. For the cash the take I'm sure they can afford someone to put together a 'Full' decent proper manual. This is my first decent quad and it really off-putting, first i couldn't connect to window 10 but youtube sorted that not Dji, my Htc one M9 won't connect to the camera yet my wifes xperia z3 does no problem and now this......not even flown yet and already thinking this could be my last Dji. cheers.