Im starting college this fall and need to make up my mind. My iBook was bought in mid-2006. A few months ago, it crashed.. the screen (without any indication), went black and I heard the computer winding down. I tried PRAM reset, and it worked. Its "died" multiple times now (I try using it every once in a while): most of the time, it dies again within a few hours. I think the crashing occurs more often than not when there is a lot of activity, many apps running. Should i spend money to get the iBook serviced (how much $?) or should I just invest in a new MacBook?