My mother-in-laws Power PC Mac Mini stopped working the other day. After booting to disk utility and seeing that there wasn't a hard drive mounting I assumed the hard drive was dead. I ordered a replacement from OWC, opened the mini, and put in the new hard drive. Now I can't get the mini to boot from CD all I get is a blank gray screen and eventually the folder with a question mark icon. Any idea?? I was under the assumption I could boot to disc again, format and reinstall on the new hard drive. I also can't get the CD to eject but it is spinning up . Any ideas??