This a picture of the start of my day with Zorin installed on a MacBook Air.*
Blank screen, other than the little curser in the top left hand corner. Anyone have a clue about why this has happened? I can start and run a live boot from a flash drive, everything works fine that way.
Try running a manual disc check while in the live CD.
Zorin is what I have currently installed and have been running with no problems for the last 10 months or so