I've got a friend that just purchased an older iMac DV SE, and installed Jaguar on it. This problem was occurring even before he installed the new OS on it, but every time he either puts his screensaver on or tries to view a DVD, the screen has all kinds of lines and distortions in it with a green tint. Otherwise, the display is fine. I tried looking into his display preferences thinking that maybe something was amiss there, but no dice. He doesn't have internet and is a recent "switcher" from PC to Mac, I certainly hope this problem doesn't turn him from Macs as he is kinda annoyed by it. I tried looking it up on the Apple Support page but the only results I kept getting were totally unrelated to the problem. Thanks in advance!