I've had the same problem with my macbook pro core 2 duo (2.6 ghz I think). I've now brought it in to the Genius bar FIVE times. So not happy about it. They have no idea why its doing it, and they just keep replacing stuff and giving it back to me and saying its fixed. But wont give me a new computer. They've replaced the batttery, logic board, heat pipe(?), and some of the power management components, and reinstalled the os twice.
error code -81. They say its not in the book, and they dont know what it is. Anyone have any tips for the geniuses?
Ambient light sensor? Hmmm. Maybe I'll suggest that to them since they're still working on it at teh shop. thx