Pro Tip: This is easiest to spot during boot up.

No backlight and no display means you can safely rule out software.

If you don’t have any signs of backlight, check for an image on screen by shining a flashlight at your display.

If the Apple lights up, your backlight is working.

Pro Tip: Macs with a white Apple logo on the lid use the display backlight to illuminate.

Is your screen lighting up? Try powering on in a dark room for easier observation.

If you're getting any sort of pointer, your display hardware is working properly.

Move your cursor around, especially towards the corners, or edges of the display.

Try these tests to point yourself in the right direction. Certain information can help hone in on a specific problem. Troubleshooting is a process that often resembles medical diagnosis. This can clear any bunk startup settings, or resolve issues where your Mac is stuck in sleep.

Reset the System Management Controller (or SMC).

These are terms for a small amount of memory which contains system settings for the Mac, including brightness and display resolution. Docks or multi-port hubs are notoriously problematic, especially if they have many items connected.

If you only have the row of Function Keys, display brightness can be adjusted up or down with F2 or F1, respectively. If your Mac has a Touch Bar, the brightness can be adjusted by moving the slider marked with the Sun logo. This may kick the device out of sleep, or power it on if other methods are not working. Try a different port if you have multiple. This can resolve any minor hang ups in the startup process or resolve a stuck update.

Wait a few seconds, then try to power on again. Press and hold your power button for fifteen seconds, then release. Before undertaking any of the more time consuming solutions below, these are a few fundamentals to get you started. It’s easy to forget some troubleshooting basics amidst frustration.

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