Réponse à : « Why does this mac keep going to sleep? »My 233 mhm G3 is the first generation. The PMU board is located on that model to the LEFT of the track pad as shown in the “Service Source” Manual. So I placed a screw tray magnet right about that and I was able to get it running! Mine would fall asleep boot after it reached the desktop. I bought a new hard drive (40GB) after the last one crashed. It worked fine before that. I also made a new back up battery from separate cells I bought off eBay, but that is a different story.