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Problem today. Computer was left on when I went to lunch. It was not connected. When I came back, it would not wake up. I plugged it in for a while.Then restarted it. Now when I go to restart it, the power light comes on (plugged in) and as soon as the screen lights the power light goes out and stays ouy.If I close the lid the power light comes on as the screen goes out. Never seen anything like this. Any ideas?
MacBook, Mac OS X (10.7.5)
Hello George,
It sounds like the light on the power adapter will turn off when the display is on. I recommend resetting your System Management Controller when something like this is occurring:
Resetting the SMC on Mac portables with a battery you can remove
Note: Learn about removing the battery on MacBook and MacBook Pro.
- Shut down the computer.
- Disconnect the MagSafe power adapter from the computer, if it's connected.
- Remove the battery.
- Press and hold the power button for 5 seconds.
- Release the power button.
- Reconnect the battery and MagSafe power adapter.
- Press the power button to turn on the computer.
Resetting the SMC on portables with a battery you should not remove on your own
Note: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).
- Shut down the computer.
- Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
- On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
- Release all the keys and the power button at the same time.
- Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
You can find the full article here:
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/ht3964
If you continue to experience issues with the light on the power adapter, I would continue with the steps in the section titled "Troubleshooting power adapter issues" in the following article:
Apple Portables: Troubleshooting MagSafe adapters
http://support.apple.com/kb/ts1713
Thank you for posting in the Apple Support Communities.
Best,
Sheila M.
Wish I could say this was the problem but did not work. Thanks tho.
Hi George,
Thank you for the additional information. Due to the nature of your issue or question you may find more information by using another one of Apple's support resources - https://getsupport.apple.com/GetproductgroupList.action
All the best,
Sheila M.
It sounds like you may be talking about the Sleep Indicator Light, in which case it isn't always on, only when your computer is sleeping..
Power Light going out when screen lights
