There is a point we just can’t get to as our skills and available tools prevent us, sadly this is one of those spaces.
Think of it this way your loved one has a brain cancer who would you allow to do the surgery? Your family doctor or someone who specializes in brain surgery? Clearly the specialist will have a better outcome in the surgery!
This is the same case here. You will have a hard time just opening the display assembly just to gain access to the bonded ribbon cables to the glass LCD panel and you don’t have the tools to properly remove the cables without lifting the Metal Oxide pads the cable needs to bond with, if that was the issue.
In this case the chroma effect you see is not the ribbon cables it’s a defect in the T-CON logic which is that small logic board hanging from the display that the LCD, backlight & camera ribbon cables attach to.
Sadly you need a new display assembly.
Here’s one source [https://www.thebookyard.com/parts-retina-macbook-pro-13.php?cPath=39_1263_1265_695&sort=2a&filter_id=14|TheBookYard UK] you need a used display assembly a new display bought from China won’t have the firmware loaded so the camera won’t work. Lastly here’s the guide to put in on [guide|133311]