Reversing camera guidance lines missing.

[Mark Grand]

Just a bit of info for people. The guidance lines on the screen when reversing disappeared. The parking sensors still worked ok but no lines visible on screen. 
The fault that I found was the wiring loom between the boot lid and the boot. There were several cables broken through general wear and tear of opening and closing the boot. 
I replaced the loom with a brand new one which is very easy to do. There are some guides on YouTube if your not sure. 
Everything’s working as normal now.