i have an old powerbook g4 and im assuming its hd is dead. i did check the smart status and it said its failing when attempted to reinstal tiger. what happened was after it did re-install the OS. the machine just turned off. but the sleep light was still on. i pulled out the battery and the sleep light was still on. so, i just wanna know if its the hd that caused it or something else internally, i am hoping its not the logic board. please help!