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The PMU controls the Mac power supply.

The Macintosh Energy Administration Unit yous an integral part of the Mac PC. It controls numerous of the principal energy aspects of the computer. If your computer is having issues powering on, returning away from sleep form or holding a battery charge, then there might be an issue with your Power Management Unit. Resetting the PMU remains the optimal answer to problem-fixing some of these issues.

Difficulty: Tolerably Simple

Reset the PMU

1 Turn off your Mac PC also wait for it to fully shut down.

2 Disconnect all of the wires if it is some desktop and move the computer to a counter best. If you are using any laptop, remove the battery plus place the computer on a counter top.

3 Discharge yourself of any static by touching anything metal. Try not to carry out the computer while standing on carpet.

4 Locate the "Reset" button on your distinct PC. Every Mac computer model has the button inside a distinct location, so refer to your user's manual for the exact location of the PMU reset button.

5 Press the button ONCE and only once.

6 Wait for with least 10 seconds and reattach the power cables to the PC or reinsert the battery. Don't attach any extra cables just nonetheless.

7 Change the computer again on. The PMU will be reset.

References

The way to Reset Mac PMU: Easy Steps with Resetting the PRAM, NVRAM and PMU Resetting PowerBook and iBook Power Managing Unit (PMU)

Photo Credit power supply picture by robert mobley out of web site ;

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