Sorry it took me so long to get back to you guys, I finally had time to attemp this. I went ahead and did the re flow folowing fregac's instructions above. I now have a working iMac G5!!! :D Before i started I booted up using techtool pro and ran the graphics test, sure enough it reported a GPU problem. After the re flow I performed the same test and no problems were reported. The machine booted up just fine the very first try!! I left the mac on for about 3 hours while monitoring temps using the iStat pro widget and no overheating issues!! I also did some photoshop work to see how it would perform in a demanding environment. Everything is working just fine, it has been about 4 days now and everything seems fine! Big thanks to fregac!!! Thanks man!!