Hey guys, My brothers powerbook (15" 1.25) is acting screwy. After replacing his RAM and hard drive the computer will lock up and the screen will just fade lines. The RAM was kingston and has been returned for new ones a couple of times. He finally put the standard Smasung RAM (512) that comes stock and KBYTE RAM (256). He's run hardware tests and it either comes back clean or locks up during the hardware test. My question is do you guys think that it is either bad RAM or a fried video card?