hello everyone who read my thread. and thank you for spending your valuable time and trying to help me. today i was organizing my mp3 through itune on my window xp(through bootcamp). and i went downstair to get some water. when i came back, my macbook had white screen and never back to normal screen. that was really weired. then i was trying to restart the computer and holding opt button so i can go back to window mode but it made some scratch sound and just stay to white screen. i think the sound came from the HDD. im not sure what just happen but i am guessing that HDD must died. i had reinstalled osx 3 times and 2 time of windows. maybe that cause HDD to die? i dont know. please if anyone knows what the problem is, tell me and if i need to replace with a brand new HDD, please recommend me a HDD. thank you very much!