Hi all, I am a new mac user (have used them before but never owned one) and today was given an Imac G5/17/1.8 unit that they cannot get working. Its in great condition, however when you push the power button, you get a chime sound and the light on the front comes on, then it goes off and every 3-5 seconds the light comes on and goes off again. In the mean time the fans are going hell for leather. I opened up the unit since it is probably outside of any warranty now anyway, and found the Hard drive had been unplugged, so I re-connected it, however I also noted the ram was missing. Will a mac boot up without any ram in it, and assuming I put ram in, and the issue remained, what would be the most likely cause of this problem on startup. I would love to have this working.