i just had my logic board replaced and now my sound is one thousand times better! but i didnt know that replacing the logic board would improve the sound quality so much?? am i just making this up? my girlfriend mentioned it without me bringing it up, so it's not just me! just curious how it works. oh and also i should just say.. apple's customer service is the best! i've had my superdrive, AC adapter cable, and graphics card (logic board) replaced all without any trouble... it's kind of bad that all these parts failed in the first place, but the service is awesome! oh and now my Wi-Fi is definitely 100% better (as i am connected in a room of the house that NEVER worked before),, WHAT HAPPENED?!?!