My G5 - desktop. Made a sound like an airplane landing, fan blasting, loud engine like roar. On Screen on a black background, it looked like it went retro, with code and error messages, and so I quickly shut it down. Upon turning it back on, it will not go past the point of the blue gel spinning and saying MAC OS X STARTING, but it doesnt start, it just sits there. I tried ejecting the DVD tray so I could put in Tecjtool Pro but it wont eject. It also wont startup on the edrive I had created. It's juts sort of frozen. I am past my applecare and would like to see if I can get advice before spending rediculous amounts of money I do not have. ANyone out there have any suggestions? Thank you.