![Ham radio deluxe waterfall display 7300](https://cdn1.cdnme.se/5447227/9-3/24_64e61dfd9606ee7f8b257167.png)
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.
![constant hangs on late 2013 imac constant hangs on late 2013 imac](https://laptopvang.com/wp-content/uploads/2017/11/imac-me088.jpg)
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.
![constant hangs on late 2013 imac constant hangs on late 2013 imac](https://24hstore.vn/upload_images/images/2020/08/25/danh-gia-apple-imac-27-inch-chuyen-nghiep-hon-bao-gio-het-1.jpg)
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.
![Ham radio deluxe waterfall display 7300](https://cdn1.cdnme.se/5447227/9-3/24_64e61dfd9606ee7f8b257167.png)