Our old PowerMac G4 350 MHz Quicksilver was acting up lately. I set the PRAM hoping that it might help. It got worse. Now, when I hit the start-up button, it starts up but in OS 9.2, which I have in a separate partition. When I select the OSX partition as start-up disk from OS 9.2 control panel and hit the re-start button, it starts but hangs half-way; I get a gray screen with Apple logo and a spinning broken circle below it. I waited as long as 30 minutes; the gray screen remained without any change. Does any one know a cure for this problem?