Yep, had the same problem with my CX2---After only a few flights---I replaced the servo (don't remember which one, now) & no more trouble!---I did disassemble the servo, removed the gears so as to disengage the pot, then plugged it back in & moved the stick, nothing---I then spun the motor spindle with my fingers & it started running---I ran it "Full" stick for a few seconds--- & then again---& then again---Reassembled it & it works normal---Still I don't trust it so I filed it in the "TC"---