Hello again all, I have started to progress in my Apple education, and I have hit the first hurdle. I have got my hands on a Dual 1.8Ghz G5, the last owner obviously removed the HDD and the RAM and Graphics card, so I thought this should be easy enough to resolve. New 320gb HDD, 2 partitions, partition 1 100gb partition 2 200gb, ati radeon 9800 pro mac special edition graphics card, and to start with 1gb of RAM. I did think it would be a case of install all the bits of kit needed, start machine, load OS X and off I go. Not the case, when I press the power button the front LED flashes, the fans come on, the hard drive sounds as if it is powering up, but I have no power or activity from the keyboard and mouse, the video card also powers up as the fans on it are running. No activity on the monitor screen. I have done a PRAM reset by pressing the button, I have changed the battery. All I get in simple terms is a box that power up with a flashing LED and no other activity?? I also get no BEEPS on power up!!!!!!! What I have also done is I thought fine I used my G4 Quicksilver with a USB dock and I loaded my new OS X 10.5 Leopard onto the new hard drive, that was successful, I put it back into the G5 still no joy. Could the Logic board or the CPU's be U/S? I have also now taken the CPU's out, and I have tried using just one to see if they are U/S, it does not make a difference. Does anyone have any advice on how to start a G5 that you have rebuilt?? I thought if I put the relevant parts together as I have done many times in the past with normal PC's, it should just be simple??