Mac Mini 1.66 Core Duo starts, but no desktop
I've tried to reset the SMC, PRAM and start in safe mode as well as start from a CD. Keyboard commands are ignored. I have verified that the keyboard works, because it accepts login password. At the log in screen, I get a pop up alert that the disk is full. Once I'm logged in, there is no desktop, no HDD access, no Apple menu. It's all just blank. Any help?