I have a 15-inch PowerBook G4 that is having logic board issues. The startup chime is intermittent and the computer does not recognize one of my two 256MB SDRAM SODIMMs (despite a memory chip swap-out by a Genius at an Apple store to make sure it wasn't bad RAM.) It looks like I have to send it in for servicing, and luckily I bought AppleCare with it. Does anyone know roughly how long it takes to get something like this repaired? I've never sent any Apple hardware in for servicing and I don't have any other computers.