I shut it down last night and tried to turn it on today, but to no avail. The only signs of life I get is the hard drive quitely hums when I start it up and the green caps lock light works. I get no chime, no screen activity and as far as I can hear with my ear pressed up to the case, no hard drive activity except for the platter spinning. (no clicks or ticks) In an attempt to fix this problem i have performed the following steps -reset power PRAM, and NVRAM -reset Power manager -disconnected all usb/firewire/ext devices -tried starting in target disk mode -tried booting from CD. help me obi-won, you're my only hope.