Sounds like a hardware issue ? Make sure everything is plugged in ! ------Original Message------ From: Bruce Ryan Nakamura Sender: g4-bounces at listserver.themacintoshguy.com To: g4 at listserver.themacintoshguy.com ReplyTo: A place to discuss Apple's G4 computers. Subject: [G4] Empty set symbol on the screen Sent: Feb 19, 2010 11:50 AM Hello, Instead of a ? mark, one of my G4 MDDs is showing an empty set symbol on the screen upon start-up and won't fully boot. What does the empty set symbol mean? Thank you, Scot Bruce Nakamura _______________________________________________ G4 mailing list G4 at listserver.themacintoshguy.com http://listserver.themacintoshguy.com/mailman/listinfo/g4 C-LYNN