I have a bit of a dilemma, my 17" iMac's (original revision core duo) logic board went bad, and I do not have the funds to replace it. I want to sell it on eBay as-is for parts with the hard drive wiped clean. The problem is, I cannot see the screen on my mac, but I can, however see my home folder over the network. The logic board is bad, according to the man at the apple repair store. Is there anyway I can format the HD without being able to see the screen at all?