I picked up a 20" G5 1.8 iMac recently and need some help troubleshooting. I have got it to chime and boot once and a while. I was even able to boot it in firewire mode so I could update to 10.5. However, most of the time it will not chime, and the fans will blow on high after about one minute. I have swapped out the ram and power supply and get the same results. The caps look great, not even the slightest of bulges. LED 1 and 2 come on consistently and 3 only comes on when it decides to boot. The fan from the processor dosen't blow very hard, so is it possible the processor is damaged? Thanks in advance for any tips or advice.