My 27" iMac crashed with a blue screen of death. Blue and black vertical lines. Now it no longer boots. The fans spin up, I can hear the hard drive and the DVD drive for a bit, but nothing happens. There is no Apple chime or any type of error codes. I have a USB keyboard and none of the keyboard start options do anything. I can't even eject the DVD from the DVD drive by holding eject or F12 while booting. What are the chances the hard drive died? Would I hear the Apple chime and see anything on the display if the hard drive was at fault? I don't care much if the motherboard or graphics card died. But a dead hard disk would be bad news. That's why I'm asking what the chances are that it's something other than the hard disk.