Shut down your computer.
Unplug the power supply and take out the battery.
Hold the power button for 5 seconds.
Replace the battery and hold down Command+Option+R
Hit the power button while holding these keys and the second after you hit it hold down P as well.
Keep these 4 buttons held until your hear the startup chime for the second time
Your keyboard will be back to normal!
Unplug the power supply and take out the battery.
Hold the power button for 5 seconds.
Replace the battery and hold down Command+Option+R
Hit the power button while holding these keys and the second after you hit it hold down P as well.
Keep these 4 buttons held until your hear the startup chime for the second time
Your keyboard will be back to normal!