I have two iMac G3's (both DV) here at home, one has a bad screen and the other has a bad motherboard. (or so says the person I got them from) So I took the bad motherboard out of the one and replaced it with the good one from the iMac with the bad screen. It boots up, but it shows a purplish-blue screen with a folder icon flashing between the Finder icon and a question mark. I assume this means there is no operating system installed? So I tried putting in my Panther install disc, and it got to the white screen with a gray Apple logo and the spinning "loading" indicator. Then the Apple changed into a circle with a line through it (like a do not enter sign). It also did the same with my Tiger install disc. Does anyone here have any idea what's wrong?