So my brother's iMac G5 (the original with the obnoxious loud fan) seems to freeze up a lot. We're trying to figure it out. While messing around in Safari, iTunes, iMovie, etc... it will freeze. The only solution is to hold the power button and shut it down. Upon restarting sometimes he will just get the grey screen of death. Nothing happens. Again force shut down and restart. He also will get the spinning beach ball of death where he can't force quit anything. Boils down to a frozen system and the only way to get out of it is to force shut down. We have run DU and hardware test (From the DVD) and everything passes. So we reinstalled 10.4.11 hoping that would clear the issue. Nope. It still freezes up. So I'm wondering is it a hardware issue? HDD? He does have some external LACIE HDDs hooked up but not sure if that could cause any issues. Ideas? I assume bring it in to a store...thanks!