Hi everybody, i have problem with my mavic pro, when i start it, it give black screen and no live vedio with massage in upper left forner ( no image transmission signal) , itried firmware downgrad, formating sd card,removing the sd card,using 3 different mobile phones, usend 3 different cables, resetting the camera settings, calibrate every thing in the drone, tried also to change the transmission cable, but all of this not solve the issue any advice help to solve this issue? , thanks on advance.