I have been trying to get a G5 working for a while now with no success. I will just give you a rundown of the situations I am having: The computer passes all Apple Hardware tests from the installation CD that came with the computer The computer turns on and makes the startup chime The computer will show the boot devices (hard drive, DVD, CD, etc) The computer will not boot the OS, just spins and spins under the Apple logo, then turns into the gray "No" symbol. Then the fans start spinning up to full speed, as if the computer is going to take off like a helicopter. The computer will not boot off of the CD/DVD, just spins and spins under the Apple logo then turns into the gray "No" symbol. Then the fans start spinning up to full speed, as if the computer is going to take off like a helicopter. Its like the computer wants to work, everything SEEMS fine, however it just refuses to boot off of any devices. I have swapped the RAM, video card, hard drive, and DVD drive from a functional G5 with no success. This problem is baffling me like none other because everything LOOKS like it should work, however it just craps out. Back when it was working it would randomly freeze up and the fans would kick up to full speed. I have gotten it to boot from CD a few times but it was random and not consistent. It kept rejecting the leopard DVD (spitting it out over and over). Any more suggestions before I throw this thing into oncoming traffic?