Apple M4753 manual

		Troubleshooting		Symptom Charts/Power - 7
			1	Reset power manager (shift-Fn-Ctrl-Pwr button).
	Computer runs when
plugged into wall			2	Check battery shims (refer to Additional Procedures
outlet but not on			3	chapter.)
battery power				Reseat battery to make sure battery is mating with contacts
			4	on I/O logic board.
				Try battery in opposite expansion bay.
			5	Try known-good, firmly seated, charged battery. Repeat once.
			6	Try known-good power adapter.
			7	Replace charge card.
			8	Replace PMU board.
			9	Replace power supply card.
			10	Replace I/O logic board.