I'm new here... I bought a 1ghz ibook g4 a month and a half ago, and over the weekend it started freezing up on me. Then I got a kernel panic...I shut down, let it sit for a while and then rebooted. Instead of getting the startup screen, I got a dark screen that colorshifted to white, revealing a series of 2 inch thick vertical bars. It continued to colorshift to purple...I let it sit for a while and then rebooted, got a kernel panic, shut it down, and it started working fine...until I bumped it. It froze, so I rebooted, and the vertical bars thing happened again. I left it over night, and it was working fine the next day. I used the hardware test disc, which froze the first time, rebooted, and ran a successful test the second time. EVERYTHING PASSED! It worked fine for a while and then the same things started happening, so I've taken it in for repair. They don't know what the problem is. Do any of you?