Hi folks, I'm not new to macs, but I haven't used one much in recent years. But this week, the trash fairy saw fit to allow me to stumble across a 24" iMac in a dumpster! I couldn't believe my luck. Sure, SOMEthing had to be wrong with it, but cosmetically it looked OK! Upon getting it home, I was further amazed when it booted up... once. Very, very slowly (about 15 minutes.) I had a busy weekend, then tried it again last night. Instead of the slow-boot, it now just restarts over and over again, usually before the startup chime can even sound. To me, this would seem to indicate a faulty logic board (that's what google tells me, anyway). I did the research and discovered that using Apple to get a replacement will cost many hundreds of dollars, so I'd rather buy an OEM or secondhand board myself and do the replacement. I routinely replace optical blocks in LCD projectors, so I'm not intimidated by cracking open the iMac and swapping in a new board. I just have one question: what's the specific part # for the iMac 24" early 2008 (aluminum) logic board? I just want to make sure I don't mistakenly order up the wrong item from eBay. I'd also like to solicit advice: has anyone else done this repair? How were your results? Are there steps to take that will prevent a similar breakdown (I understand this is pretty common in older imacs)? Anyway, the rest of the machine appears fine, so I'm pretty excited. Not as good as a TOTALLY FREE iMac, but a $150-200 iMac, especially with that beautiful 24" display, seems like a good deal to me. I figure if the repair sticks and I get an SSD, I can get another 2-3 years out of this machine, easily. Hope y'all can help!