Reset your PMU: http://support.apple.com/kb/HT1431
- Shut down the computer.
- Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
- Turn on the computer.
- Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
- Hold the keys down until the computer restarts and you hear the startup sound for the second time.
- Release the keys.
Update -- it worked! Weird. Here's why. I could hear the chimes afterall. So before I did the pram I randomly took the battery out. Then tried to put it back in but it wouldn't fit. Found a tiny screw wandering about. Pulled that out. Did the pram -- and voila -- it works now.
I guess it was the pram? Even thought I tried it before and it didn't work. Or was it the wandering screw????