Remove any RAM you've recently added and restart again. RAM with incorrect specifications can also result in a gray screen.If the Safe mode boot fails or gets stuck, then reset both NVRAM and SMC settings as mentioned earlier.If your Mac completes the startup process here, restart again in normal mode and verify that your startup drive is working properly. Plug in one peripheral after each restart to find the culprit. Thus, you should detach all wired accessories, then press and hold the power button to shut down your Mac. Faulty peripherals are the primary cause of gray screen problems.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.

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