so i have a G4 powerbook that has already had its logic board replaced once, about a year ago, but is now in need of another replacement...i have applecare but of course, i have a dent in my computer right by where the power adapter pugs in that is preventing me from getting any service from apple. i was thinking about just replacing my bottom casing myself so i wouldn't have to pay the insane $1000 to have apple do it but will apple take it in, dentless, if the casing was replaced but not by them? since the serial number is printed on the casing, i think it will be pretty obvious that the casing was replaced. any ideas? i don't want to replace the logic board myself because i think there may be other problems also, possibly electrical. i get a funny vibration from my computer. basically i'd like to do whatever i can to get me back in applecare's good graces. last night i opened my baby up and tried to punch out the dent myself but no dice. please help! i am poor and cannot afford apple's ridiculous rates right now.