Q. How do I
reset the Power Manager or PRAM on my MAC?
PowerBook G3
(M3553):
The PowerBook G3 (M3553) has two different ways to reset the Power Manager. The
first is to use the reset button to the left of the Serial port.
Resetting the Power Manager
1. If the computer is on, turn it off.
2. Restart the computer by holding down the reset button to the left of the
Serial port for 10 to 20 seconds.
3. If the computer does not restart, repeat step 2 three or four times.
Resetting the Power Manager and
PRAM
Resetting the parameter RAM (PRAM)
when the computer is shut down also resets Power Manager. The following process
resets both the Power Manager and the parameter RAM.
1. If the computer is on, turn it off.
2. Make sure the Caps Lock key is not down.
3. Restart the computer. Immediately after hearing the startup sound,
simultaneously press and hold Command-Option-P-R. (If you do not hold down the
key combination within 5 to 10 seconds after the computer restarts, you must
repeat steps 1-3.)
4. Hold down the keys until you hear the startup sound again. Then release the
keys.
5. If the computer shuts itself off, press the reset button on the back of the
computer to turn it back on.
6. When the computer has finished starting up, restore any custom settings for
the desktop pattern, memory, network, AppleTalk, trackpad,
power conservation, and so forth.
1. If
the computer is on, turn it off.
2. Simultaneously press Shift-Fn (function)-Ctrl (control)-Power.
3. Wait 5 seconds.
4. Press the Power button to restart the PowerBook computer.
PowerBook
G3 Series (Bronze Keyboard) (M5343)
1. If
the computer is on, turn it off.
2. Press and release the reset button on the rear of the computer. The reset
button is located between the external video and modem (RJ-11) ports.
3. Wait 5 seconds.
4. Press the Power button to restart the PowerBook computer.
Note: When you reset the power manager, wait at least 5 seconds
before pressing the power button to start up the computer. If you do not wait
at least 5 seconds, the reset procedure may fail. (If you suspect that the
reset procedure has failed, press and release the reset button again and wait 5
seconds before pressing the Power button.)
iBook and iBook (FireWire) computers
1. If
the computer is on, turn it off.
2. Disconnect the AC power adapter.
3. Remove the battery.
4. Press and release the reset button (shown in Figure 1) located above the
Power button at the base of the display. Use a small, blunt instrument such as
a paper clip to press the button.
5. Wait 5 seconds.
6. Reconnect the AC power adapter.
7. Put the battery back in the computer.
8. Press the Power button to restart the iBook computer.
Figure 1 Reset button
iBook (Dual USB), iBook (Late 2001) and iBook (14.1 LCD)
1. If
the computer is on, turn it off.
2. Disconnect the AC power adapter.
3. Remove the battery.
4. Press and release the reset button (shown in Figure 2) located above the
Audio/Video port on the left side of the iBook (Dual USB) computer by inserting
the end of a paper clip into the small hole and gently pressing the switch
once.
5. Wait 5 seconds.
6. Reconnect the AC power adapter.
7. Put the battery back in the computer.
8. Press the Power button to restart the iBook computer.
Figure 2 Reset button on iBook (Dual USB) computer. Note: The red
dot shows the button's location. The button is not actually red.
iBook (16 VRAM), iBook (14.1 LCD 16 VRAM), iBook (14.1 LCD 32 VRAM),
iBook (32 VRAM), and iBook (Opaque 16 VRAM)
For iBook (16 VRAM) computers and later models of iBook, there is no physical
reset button.
1. If the computer is on, turn it off.
2. Reset the power manager by
simultaneously pressing and then releasing Shift-Control-Option-power on the
keyboard. Do not press the fn (Function) key while
using this combination of keystrokes.
3. Wait 5 seconds.
4. Press the power button to restart the iBook computer.
1. If
the computer is on, turn it off.
2. Press and release the reset button located on the rear panel of the computer
between the external video and modem ports.
3. Wait 5 seconds.
4. Press the Power button to restart the computer.
PowerBook
G4 and PowerBook G4 (Gigabit Ethernet)
1. If
the computer is on, turn it off.
2. Press and release the reset button located on the rear panel of the computer
between the external video and modem ports.
3. Wait 5 seconds.
4. Press the Power button to restart the computer.
PowerBook
G4 (DVI) and PowerBook G4 (1 GHz/867 MHz)
1. If the computer is on, turn it off.
2. Disengage the two keyboard latches located between the Esc and F1 keys, and
the F11 and F12 keys. (You may also need to disengage the keyboard locking
screw located between the F5 and F6 keys.)
3. Lift the keyboard.
Note: To ensure no harmful static electricity is transferred to the
computer, properly ground yourself before performing
this procedure.
4. Press and release the reset button located on the upper right side of the
logic board near the power button. (See Figure 3.)
5. Wait 5 seconds.
6. Press the power button to restart the computer.
Figure 3 Reset Button on PowerBook G4 (DVI) and PowerBook G4 (1 GHz/867
MHz)
PowerBook G4 (12-inch) and
PowerBook G4 (17-inch)
1. If the computer is on, turn it off.
2. Reset the power manager by simultaneously pressing and then releasing
Shift-Control-Option-power on the keyboard. Do not press the fn
(Function) key while using this combination of keystrokes.
3. Wait 5 seconds.
4. Press the power button to restart the computer.