Black screen trouble shooting:
If the camera is physically connected correctly and you get a black screen then trouble shooting needs to be done to work out why you are getting a black camera image to appear.

On standard vehicles

    1) Test the voltage
    On some older cars the power wire to the reverse lights may have suffered some power leakage resulting in less
    than 13.8V at the rear.  The camera will work at 12V but it is not uncommon for some cars to only get say 9V.  
    At 9V the globes will work, the unit will still switch the camera input but the camera itself will not be on.

    If you are unsure one of the easiest places to get 12V is from either the Red or Yellow wire powering the unit.



    2) Camera not pushed in correctly
    At the camera join to the reducer unplug and check to ensure it it plugged in correctly

    3) Plug the camera to the AUX input
    There is a chance the socket is / cable are damaged. 
    Then from the main menu go to
    Setting
    General
    Reverse detection.  Turn this off.

    Then put the vehicle into reverse and the black screen will no longer display but the camera should still be powered.

    Next from the Main Menu select
    Media
     
    The press the no 2 buttons (At the top of the screen -just under where is says Media)

   
    Select the AUX input and see if the image is coming from the camera


    4) If all the above are checked and tested its time to replace the camera. 




On CANBUS vehicles

    1) Camera not pushed in correctly
        At the camera join to the reducer unplug and check to ensure it it plugged in correctly

    2)  If you have used a filter then by pass this to eliminate this as the problem
   
    3) There is a chance the socket is / cable are damaged.
        Plug the camera to the AUX input
    
        Next from the Main Menu select
        Media
        
        The press the no 2 buttons (At the top of the screen -just under where is says Media)

       
        Select the AUX input and see if the image is coming from the camera
 

    4) If all the above are checked and tested its time to replace the camera.