sleep disorder

My ibook snow running 10.3 is not waking up from sleep. Or it is shutting down when put to sleep.
jasone wrote on :
My ibook snow running 10.3 is not waking up from sleep. Or it is shutting down when put to sleep. When reset it goes back to sleep while booting. Or if I get as far as the desktop, it goes to sleep then. True on battery or AC. Can anyone suggest an approach to this problem?