macbook pro 3 beeps on start black screen

If you have a simple gray screen when you boot, here's what to do: But if the startup process gets stuck, no matter how long you wait, you'll see only a plain gray screen or one with symbols.ĭepending on what you see, follow these instructions. Once you power on your Mac, a sequence of booting events occurs until the login screen or desktop appears. This is the last step you should try before taking your Mac in for a repair. On a desktop Mac, unplug the cable and wait ten seconds. If your Mac is running, it'll cut the power and force it to restart.

On a modern MacBook, press the power button and hold it for ten seconds. Plug in your peripherals after a reboot and see if it all works properly. Unplug all peripherals except your keyboard and mouse, then try to boot.

There might be a problem with your accessories.

Also, try raising the monitor brightness to make sure that it's not turned down extremely low.

Check the video-out cable connection with the external display (if any).

Next, check the wires for damage and try a different charger or cable.

Check the power connections to make sure they're secure on both ends.

Instead of panicking, try these steps one at a time to diagnose the problem: There's no power light, no sound, and a completely black screen. You press the power button on your Mac, and nothing happens.

Macbook pro 3 beeps on start black screen