I recently purchased an 867 MHz Quicksilver at a local university surplus sale for $5. It had no hard drive, they weren't certain if it worked. For 5 bucks, I couldn't pass it up. Once home I popped in a 12 Gig hard drive (not wanting to risk a larger one) and it fired right up and worked for a couple hours as I fiddled with it. The next day I installed a 120 Gig HD and it wouldn't power up. I put the 12 Gig back in and still no dice. It hasn't powered up since. I found that the battery was dead. I replaced it with one from another working Mac but it still won't power up. The power button lights briefly when depressed but nothing else. Any ideas?