I recently purchased an ibook g4 12" 1.33 GHz logic board and put it in an ibook G4 14" 1.42 GHz case. All worked fine for about 2 minutes. Now the power adapter breaker trips every time I plug it in, but it still runs fine on battery. I have tried DC boards from both 12" and 14" models. Am I missing something, or are these incompatible? Did I fry something on the board? Please help.