If you plan to visit an Apple Retail Store, make a reservation at the Genius Bar, if available in your country or region. If your Mac still won't start up after you've tried each of these steps, visit an Apple Store or Apple Authorized Service Provider for further diagnosis.
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If possible, reinstall the original memory or drive to see if the issue persists. If you recently installed memory or a drive in your Mac, make sure it's compatible and installed correctly. Then press the power button again to see if the Mac turns on. Hold down the power button for ten seconds. This includes things like printers, USB hubs, or mobile devices. If you're using a Mac notebook, learn about troubleshooting MagSafe adapters, and leave the power adapter connected long enough to provide an adequate charge to the battery.ĭisconnect all accessories that are plugged in to your Mac. If the wall outlet is working and you continue to have no power, try another power cord or adapter, if available. To check if the wall outlet is working, plug in a lamp or other electrical device. If the display is flickering: Make sure your Mac and display are connected to one another with good quality cables and adapters. Then click the button to detect the display. To see the Detect Displays button, press the Option key.
Verify that you have a good connection from your Mac to the wall outlet by confirming the power cord and adapter are securely connected and plugged in. Choose Apple menu > System Settings, then click Displays. If your Mac won't turn on and you have ruled out display issues, try these steps. If any of these things happen and you have an external display, get help with video issues on external displays connected to your Mac. Pressing the Caps Lock key on the keyboard causes it to light. You may see a light from the Sleep LED, if your Mac has one. If your Mac has power but doesn't have any video: To be sure you're not having a display issue, press your computer's power button. Learn what to do if your Mac won't turn on.įirst, rule out the display as the source of the issue.
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