Shuts down after sleep, won't start up

Question

I've got what sounds like a common problem with my just-purchased iBook---it shut down at some point last night in sleep mode, and won't start back up. Of course, I disconnected everything but the power supply before attempting to start up, but to no avail.
I read in another thread that removing the battery, then immediately replacing it, seems to help some folks. I'll try that next. Failing that, what should I try next?
Any ideas greatly appreciated!

Answer 1

Sam,
This has happened once to my wife's iBook.
I fixed it by resetting the PRAM, as suggested by a very helpful Apple Tech. person:
1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.
Your computer's PRAM and the NVRAM are reset to the default values. The clock settings may be reset to a default date on some models.
Paul