so my powerbook is crappin' out on me, and the only way to make the screen stay clear is to put pressure on the left-rear of the computer. I think it's a loose solder (as is the case with the dual-usb iBooks with the same Radeon 7500s), but i'm not 100% sure. I'm about to buy a new board but I want to be 100% sure this is, in fact, the problem. Hopefully the video will help diagnose. Thanks!