So I have never had any issue with my screen before. A few nights ago while I was driving it flashed from the map and the Navigation reset to screen where you have to hit ok after it boots. I didn't think anything of it as the screen came right back on and was normal. The next morning when I started my car the screen was black with 1 single white line(very dim) going horizontally across the screen. The radio still works but nothing for the screen. Its weird because the clock screen above the nav display also works for the climate control and the clock but no longer displays any info for the radio while im using it. I have checked all the fuses and nothing is blown. I also tried disconnecting the positive from the battery but that didn't change anything either. Im stuck not knowing how to diagnose what the actual problem is so I can try to fix it or replace any faulty parts. Any help or ideas would be very much appreciated.