Virtual1 is the expert on that, but yes it is, or at least may be, fixable but you probably would not want to do the job yourself. It involves disassembling the lid, if not the whole iBook, and replacing the light, so with labor it could get pricey.
I know you are anxious to get back up and running, but this may be one of those times when you need to look a gift horse in the mouth.
If we knew what it was we were doing, it wouldn't be called research, would it?
