Westinghouse 190/5300 manual

Additional Procedures	PRAM and Power Manager Reset - 3
2	Power on the computer by pressing the Power key.
3	Immediately hold down the Option-Command-P-R keys.
4	Keep holding down these four keys until you have heard
	the startup chime at least one additional time after the
	initial startup chime.
	(If the PowerBook emits multiple chimes when you are
	holding down the Option-Command-P-R keys, skip to
	Step 7.)
	Note: Unlike other PowerBook models, these PowerBook
	computers often emit only a single startup chime. Then
	the screen goes dark/blank and the green sleep light
	stays on (it does not blink on and off as it does when the
	computer is in sleep mode).
5	Press the Reset button once and, after a brief pause, the
	PowerBook should start up.