Dear all, My old MB 2.1Ghz is nearly 3 years old. I had replaced harddrive, optical drive (2 times), logic board, LCD connection cable, recharger. Through out last 2 years, it has a buzzing sound from left upper corder near magsafe recharger. That's why they changed the LCD connection cable and logic board. But still, it has the noise. It sounds like electricity leaking, high pitch. Since it's gonna be out of applecare in 3 months, I wonder if it's possible to get another repair? OR the sound is considered to be somehow 'NORMAL'? I know PC usually makes the sound, and people think it's totally normal! (I ask because the nearest Apple Store is 2 hours by train...) I upgraded the RAM into 4G, so I really don't wanna loose the computer. Although I was promised if something goes wrong, they will replace me with a new current MB, I just wanna push them to fix it instead of replacing it.