Backlight works, screen won't display anthing. Everything else works.
This all started with me going to replace the battery in my ipod. There had always been a little hair or something in front of the screen (but behind the front plastic) that had long bothered me so I thought I'd get rid of that as well. Disconnected and disassembled everything, removed piece of lint, reassembled with new battery. Nothing seemed to go wrong.
If all your connections are nice and snug, your cable is tightly in the connector and the clasp is holding the cable in, I would think that you just may need anew display. They are not to expensive and not hard to change. iPod 4th Generation or Photo Display Replacement