Back up camera blank

[Phil6157]

Hi all help is needed here please

 

i I bought my c6 Allroad about 12 months ago, the seller said the backup camera needed calibration 

 

I’ve looked around etc as I was told it should work but a blank screen through mmi 2g high is more likely a hardware fault.

 

i have changed the switch box on the right hand side,

 

I have fitted a 3rd party camera. Then I found the Audi only works on a 5v system so with 3rd party camera I boosted the v to 12v and bingo I have a picture.

 

 

i have now bought an original camera and back to a blank screen so boosted to 12v and it works.

 

i was then told it’s the mmi screen so I have updated to an android radio and again blank

 

12v and it works

 

how do I increase the power to the camera or is there something wrong else where?

 

many thanks