How do you reset PMU?

How do you reset PMU?

Here’s how to reset the PMU (Power Management Unit) on your G4.

  1. Shut down the computer, and UNPLUG the power cable.
  2. Locate the small button on the motherboard labeled “PMU RESET”.
  3. Press the PMU RESET button for LESS THAN ONE SECOND.
  4. Leave the computer UNPLUGGED for at least 10 seconds.
  5. Plug the computer in and reboot.

How do you reset the power management unit on a Mac?

Unplug the power, then shut down your Mac. Hold the left Shift+Control+Option keys down, then press and hold the power button down. Keep all four buttons pressed down for ten seconds, then let go. Plug the power cable back in, then turn on your Mac.

How do I reset my MacBook fan?

Resetting the System Management Controller (SMC)

  1. Shut down the computer.
  2. Disconnect the MagSafe power adapter from the computer, if it’s connected.
  3. Remove the battery.
  4. Press and hold the power button for 5 seconds.
  5. Release the power button.
  6. Reconnect the battery and MagSafe power adapter.

What is PMU in MacBook?

The Power Management Unit controls many of the low-level functions of your MacBook. When you reset the PMU, the date and time settings are reset and any RAM disks you installed are deleted. Intel-based MacBooks use a System Management Controller, or SMC, that performs the same function as the PMU.

How do you hard restart a MacBook?

Press the “control,” the “command” and the eject keys at the same time. 2. Beware, this will immediately restart your computer and you may lose any files you’re working with.

How can I restore my MacBook Pro to factory settings?

Restore MacBook Pro to factory settings. Step 1Click on “Apple Menu” on the top bar and choose “Restart” option. Step 2When your MacBook Pro reboots, press “Commend” and “R” at the same time when you hear the Apple startup sound. Step 3Release “Commend” and “R” keys when you see the Apple logo appears on the screen.

How do you restart a MacBook Pro?

Turn on or restart your MacBook Pro. Hold down Command and R at the same time right after you restart your Mac. Keep holding down the keys until your Mac finishes loading and you see the macOS Utilities window. Click on Utilities in the Menu Bar on your MacBook Pro. It’s in the upper left of your screen.

What to do when your Mac won’t start up?

Perform a Power cycle. If your MacBook Air fails to start up after all this, you could perform a power cycle or a hard reset to bring it back to life. Hold the power button on your Mac for 10 seconds. Doing so will cut the power to your system and force it to restart.

How do you restore factory settings on a Mac?

To restore the computer to factory settings, follow these steps: 1. Hold Command and R keys while your Mac is starting to start into OS X Recovery, and open Disk Utility. 2. Choose ” Macintosh HD” on the sidebar, go to the Erase tab and erase the drive. 3. Close Disk Utility and reinstall OS X.