As far as I know there are only two ways to restart the camera, press and hold the power button or if the camera has frozen drop the battery off. If you are having problems you need to identify if they are caused camera side or computer side. If you are needing to restart the camera during a tethered session always disconnect from the computer and ensure the camera is working un-tethered before re-connecting.
Hope that helps
Nick thanks for your quick answer. There is one way to reset the camera pushing 2 buttons and the camera body reset all the parameters and start the software like new.
My english is not good but can you understand what i am trying to say?
