My iMac G5 (17", ALS model) died about a year and a half ago (logic board went on it...). It's been sitting around for a while, and I wondered if it could be used as an external display. Basically the same idea as Mac4Brains, just with a PowerPC iMac. I tore it apart, following iFixit's Guide to check out everything inside. If anyone has figured it out before or knows anything, let me know!