Hey, So the soundcard part of my logic board is wonky - and getting much, much worse. The only other issue with the computer is a screen flicker when the screen dims automatically. Should I replace the logic board? Replace the computer? Another option? How challenging is it to replace myself? I'm no pro, but have been known to tinker with replacing parts from time to time. (If the risk of destroying it is high, this seems like a bad plan) I have a C2D 2.0 - (Late 2007 I believe) If I do replace it: Do I do so with the identical logic board, or can I upgrade? How much should it cost? Thanks!