Apple 180C manual

Additional Procedures	Power Manager Reset - 2
5	Remove the AC adapter and the battery.
6	Let the unit sit without power hooked up for 3–5
	minutes.
7	Using two paper clips, simultaneously hold down the
	reset and interrupt buttons for 5–10 seconds.
8	Reinstall the battery and, if necessary, reconnect the AC
	adapter.
9	Turn on the computer.