Aftermarket radio problems power short or faulty adapter?

[Choogz]

Hi Alfa guru's

I had a professional install of a Kenwood unit with all the adapters required to switch from the default Alfa system that came from factory.

However it seems like one of the adapters is faulty or the wiring to the adapters was done incorrectly as the unit auto shuts down when attempting to access the Menu for Time/Clock/Date etc or putting the vehicle in reverse.

It used to show the reverse camera fine but now it only shows the reverse sensor dialog as the images/video shows no reverse camera feed.

Has anyone installed any of these units, because the installer can't figure it out and the warranty has lapsed. We tried replacing all adapters to no success so I feel like there is a short in the wiring loom somewhere perhaps?

https://www.youtube.com/watch?v=i-bomS7kono
https://www.youtube.com/watch?v=a1bBKo3tyN4
https://www.youtube.com/watch?v=w9RY2QIqSEk