Chosen Solution

data and time missing when turn off my ibook, where is the pcmos battery?

  1. If the computer is on, turn it off.
  2. 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.
  3. Wait 5 seconds
  4. Press the power button to restart the iBook. 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. Hook up to the internet and reset the date and time using the automatic setting box There is no PRAM (CMOS)( battery in this machine.

So, I need a good battery permanently in the computer.