Hi, I have a powerbook g4 that won't boot...I initially would get a kernel panic error after the apple loading screen, so i would reset and just kept getting back to the error. I searched through some forums and tried resetting the pram, now after the loading screen the screen just goes black (computer is on, just plain black screen). In looking through forums I read that the kernel panic is usually a hardware error; I have a new macbook that i got right before this powerbook stopped loading (at least got everything copied into the new one ) and my husband had been using the pb for the last few weeks, mostly just watching tv online...nothing strange. he got a few kernel panics the last couple days, but he would turn off and i'd open it just fine in the morning. he mentioned the screen had started flickering a few times...and now on the gray apple loading screen - the only actual image that the computer loads - the little apple also flashes between it's regular gray color and like stripy/blocky blue squares...could it be a monitor problem?? I found a bunch of "powerbook not booting" forums, but none mentioned the flickering screen...It'd be nice to know what's going on and fix it, if possible...thanks for any help!