I need to replace the logic board on a 1.8GHz iMac G5(no iSight). I already bought a tested, working board from eBay, now I just need to replace it. Any tips or things to be aware of? I am very comfortable taking apart computers, but this will be my first iMac disassembly. I can't seem to find any online guides, as I often can for Mac portables. Thanks!