![]() ![]() ![]() If present, the MagSafe power adapter LED does not show proper charging activity.External devices attached to the built-in USB-C connector on your MacBook or MacBook Pro are not recognised.The built-in USB-C port on your MacBook or MacBook Pro does not charge.The display backlight does not adjust to variations in ambient light.You can’t turn your Mac back on if it sleeps or shuts down unexpectedly.When you close or open the lid on your Mac notebook, it does not respond properly.When you push the power button on your Mac, nothing happens.On Mac notebooks with a non-removable battery, the battery indicator LEDs, if present, function erroneously.If there is a status indicator light, it behaves wrongly.The backlight on the keyboard is malfunctioning.Even if your computer isn’t in use and is properly ventilated, the fans on it run at a high speed.These signs and symptoms may indicate that an SMC reset is required: How to tell if the SMC needs to be reset: ![]()
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