Here is the fix that Apple gave me...
Disconnect power.
Remove battery.
Hold down power button for more than 5 seconds.
Reinsert battery and reconnect power.
Boot.
So far, so good. They told me that this resets the power management system.
I will post again if it fails. For anyone who has this MOO problem, you might give it a try, especially if you developed the problem with 10.4.7