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- When prompted, select your language and click the right arrow.
- After a while, Apple Hardware Test (AHT) will start.
- Press and hold the D key before the gray startup screen appears.
- Turn your computer back on with the power button.Īfter resetting both the NVRAM and SMC, what happens? Does the issue still persist? If so, see if you can test your hardware as follows.
- Press at the same time shift option control (on the left side of the built-in keyboard) and the power button.
- To reset the SMC on your particular MBP, follow these steps: speaker volume, screen resolution, startup disk selection, time zone information, etc). Note: When you log back in you may need to readjust some of your system preferences (e.g.
- Let go of the keys and let your Mac reboot normally.
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- Hold those keys down until your Mac reboots again and you here the startup chime.
- You have to make sure you press these keys before the gray screen appears or it won’t work.
- Press the power button and then press the command option p r keys.
- Yes, a full shut down, not just logging out. Reset the NVRAM on your particular MBP following these steps: However, in the meantime, I'd reset both the NVRAM and SMC again (and in that order) using the steps below.īefore doing so, ensure you have no external hardware connected and that you're using the built-in keyboard. I've added a comment to your question seeking some clarification on your issue.