XR-65A80K - Small vertical line on screen in light conditions

@watson306 a single vertical line like that is a TAB error, not a T-con board or a main board error. That is where the "bonding" that adheres the thin ribbon cables to the actual panel, come lose and no longer make contact with the panel. Take a really close look at those and apply some gentle pressure on them. You will most likely see that the lines either change or disappear. That is incredible, difficult to fix, but sometimes some downward pressure applied by some adhesive tape etc. can make them go away. For a while at least. If you have trouble identifying the ribbon and Tab, just post some more images of what you see on the top of your LCD panel.

If you have trouble identifying the ribbon and Tab just post some more images of what you see on the top of your LCD panel. It should look something like the images I've attached.

@watson306 yup. The back cover on this model is a bit more awkward to remove. Here are the instruction for the same series different but a different model number. Back Cover Removal