To resolve the issue of the A35 having a black screen, please follow these steps:
If the A35 is wired to the E800, try using a different wire for the connection.
If the issue persists, connect the wire to the adapter that was included in the original package that you have received.
Plug this into a socket and test it.
If the screen remains black after these tests, it indicates that the terminal needs to be replaced as no image is appearing on the A35.