I just solved this problem after many weeks of experiencing it. I can't believe I didn't think of it sooner. After letting my mac cool for 30 minutes (not sure if that makes a difference but I wanted to have all bases covered) I took the charger out of the socket and from the PC. I counted SLOWLY to 30. I then attached the maglite to the Mac, then plugged it in. WaLah.....it worked. I guess by decharging the Mac so as to start clean....that's all it took. I have only done it once so far but wanted to hop on here and share what I learned for any others facing this problem. My puter was dead and the green light never would turn orange. It does now!