iMac wont boot, stays on grey background, no wheel running
I was given a 2006 iMac, a 1.83MHz 1GB that has a major problem. It boots up, makes boot sound and gets then stuck on the grey background with the Apple logo. The little wheel does not show up.
I tried booting on a DVD, no way. The HDD seems to be running fine but when I force a boot on it, it starts for a while and then idles. Same for an OS DVD and when I try the Apple Hardware Tool DVD, it tries to boot but displays for a fraction of a second 'Apple Hardware tool could not read xxx.env' or something like that.
It's really weird because otherwise the system seems to be healthy.
Any ideas ?