Today I turned on the P 4p and DJI GO 4 displays the opening screen with everything ok, except: Gimbal Disconnected. No image, no information from the gimbal, like ISO, remaining shots in the card, etc... Anybody has experienced this?

Aloha fansd3,

     Under the conditions you describe, we usually recommend that you look for the cables that connect the camera and gimbal to the body of the Phantom.  Once you find them, disconnect them and reinstall them.  Be careful of any clip-type holders so you so not strip them.  (This is so much easier than the firmware effort!)

     Otherwise, you may have to refresh the latest firmware on your aircraft and remote controller and reinstall the latest version of DJI GO 4.  When you do this, and shut down everything for at least a minute, and then do a proper restart, the network is usually able to re-integrate itself to a functional state.  

     Please let us know how it goes.

Aloha and Drone On!