My display has a huge stripe down the middle that is inverse contrast. When I have the display in a certain position, like if I bend the screen ALL the way back, it'll be fine but mostly the stripe will pop back. This leads me to think the display cable is loose or not seated properly. I got to about step 9 in this guide, cleaned the connectors and re-seated but it's still there. Any ideas? I think the cable might be messed up when it goes into the black plastic hinge part. Seems pinched?