Reset av PMU, bör göra susen....
The Power Manager is an integrated circuit that is usually on the logic board of the PowerBook and iBook. As the name implies, it is responsible for power management of the computer. It controls backlighting, hard disk spin down, sleep and wake, some charging aspects, trackpad control, and I/O as far as looking at the serial port and modem so it does not sleep when connected.
Over time, the settings in the Power Manager may become unusable, which can result in operational anomalies with the computer. Examples would be not powering on, not waking from sleep, not charging the battery, or not seeing the AC Adapter, among others.
Resetting the Power Manager is accomplished in a variety of ways depending upon the computer. These methods are described below.
Warning: Resetting the Power Manager on any PowerBook or iBook will permanently remove a RAM disk, if present, and all of its contents
How to doit!
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 the reset button 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.
Note: Resetting the power manager also resets the date and time. After the reset, the system clock is set to 12:00 A.M., 01/01/1904.
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 the reset button located above the Audio/Video port on the left side of the iBook (Dual USB) computer.
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.
Note: Resetting the power manager also resets the date and time. After the reset, the system clock is set to 12:00 A.M., 01/01/1904.