Clouded screen? Do you mean kernel panic?
http://support.apple.com/kb/TS3742
This?
And possibly, the PM G4 actually have an amazing reputation for being tanks, but it may have an issue with the RAM, HD or MLB.
Try the site with a different browser. If you still have the issue, change your DNS to something like GoogleDNS or OpenDNS
So my family owns an iMac, and for the past couple weeks it's been just suddenly shutting down when we're working on it. There's no warning, no glitches, it just powers down. Subsequently when you push the power button, it doesn't respond. I've tried taking out the card at the bottom and putting it back in several times, still no response. Anyone have any ideas what's going on and what we can do about it?