my p3adv the controller is linked to the drone all green lights can fly without app/phone....but when i turn on app it says weak signal and in small yellow writing strong interference.i have tried updating firmware on drone it says aborted because latest firmware success then ive tried updating controller via lead from drone that will not update lights don't go blue after a minute.tried memory stick in back of r/c and tried memory card in stick in back of r/c still not upating no blue light.....the app says latest firmware but won't connect to camera.tried everything...tried uninstalling app no difference any help please ......pulling what little hair i got left out lol .i live Burton on Trent UK.. Know dji repair shops or software genius any video links to solve would help i have watched loads no help please forum help so stressed....