Hello friends, I hope you are well.
I have acquired the holybro x500 v2, it was assembled, calibrated and at takeoff time only three of the 4 motors rotate the propellers. The remaining motor rotates the propeller for an instant and does not rotate again. When giving more power, the engines become uncoordinated and the takeoff is aborted.
An attempt has been made to fly only in manual and stabilized mode.