Question about Apple iBook G4 Mac Notebook
My iBook G4 laptop running 10.4.11... or at least it would if it started up. For some time now the machine has been suddenly shutting down, or the screen goes almost black. If it shuts down usually it won't restart rightaway, takes maybe till next day with the charger plugged in, then it might start up... and when it does often the clock has reset to 1971!! If I enter the date and time and unlock to change with my password it will automatically reset the time to the present... until the next complete shutdown. The battery charges ok and holds a charge for a few days if unused. The computer shuts down even when the battery is fully charged. Maybe someone can make some suggestions.... Thanks very much indeed.... Adrian
This may solve your issue:
The PMU is a microcontroller chip that controls power functions for the computer. The PMU is a computer within a computer, as it has its own memory, software, firmware, input/output, a CPU, and more. Its function is to:
Resetting the PMU is not intended for resolution of a stall or situation in which the computer is unresponsive. A PMU reset should not be necessary except as a last resort in cases where a hardware failure of the power management system is suspected. Performing a PMU reset returns the computer hardware, including NVRAM, to default settings and forces the computer to shut down.
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Posted on May 16, 2009
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Posted on Jan 02, 2017
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