Potential causes of a black screen:

1. Installation in progress

   How to fix:

The best thing you can do in this situation is to wait, but if it's been anywhere between 3 to 6 hours, then chances are that the installation process is stuck.

If the installation is stuck, you should try shutting down your device completely. [...] disconnect all the non-essential peripherals, including external storage, phone, printer, game controller, network cable, and secondary monitor. If possible, also turn off your Wi-Fi and Bluetooth adapters. Only leave connected to your computer the essentials: keyboard, mouse, and display.

Wait 60 seconds, reconnect the battery and power cable, but do not reconnect any of the peripherals, and power on your computer.

If this was a mere hiccup, the installation process should resume and complete successfully.

2. Loose Connections and/or Driver issues

To Fix:
- Check to see if your display is connected properly to your computer and to power. - If possible, change the video port (e.g from VGA to HDMI). There may be a driver that needs to be updated or reinstalled. - Disable the discrete graphics card, switching to the integrated one -- this'll tell you if it's your graphics card or the drivers used for it. You can uninstall and reinstall the drivers to see if that helps. If not, I would check to make sure everything is connected to your discrete graphics card properly -- [ASUS Nvidia GT710 Installation][1] (This is just the first video I found, but there are plently more if you need them.) - Try a different monitor and/or cables -- yours could be dying, have a bad connector, etc.

• If the computer isn't detecting the display, then you can try using the Windows key + P keyboard shortcut, press P again and then Enter. You'll need to repeat this steps a number of times to cycle through all screen options.

• [...] use the Windows key + Ctrl + Shift + B keyboard shortcut to wake up your display.

3. Something connected to the computer is causing problems Disconnect everything you can so you're only left with the essentials -- i.e. tower, keyboard, mouse, monitor -- restart, then slowly reconnect things one at a time until you find the one causing the problem. Check the drivers for the device, update (and/or reinstall), and restart. If it's still a problem, you'll need to troubleshoot with the product's support center.

4. Other (more complicated or obscure reasons)

To Fix:

• Reboot into Safe Mode
  Use the troubleshooting tools in the advanced startup menu to try to track down the problem
• Backup your computer and do a clean reinstall. (It's far from ideal, but I have found this has worked for me before when Microsoft Support couldn't figure out what was wrong.) You can migrate over your files, settings, etc. if this solves the problem.

Primary Source: How to fix black screen problem on Windows 10

Potential causes of a black screen:

1. Installation in progress

   How to fix:

The best thing you can do in this situation is to wait, but if it's been anywhere between 3 to 6 hours, then chances are that the installation process is stuck.

If the installation is stuck, you should try shutting down your device completely. [...] disconnect all the non-essential peripherals, including external storage, phone, printer, game controller, network cable, and secondary monitor. If possible, also turn off your Wi-Fi and Bluetooth adapters. Only leave connected to your computer the essentials: keyboard, mouse, and display.

Wait 60 seconds, reconnect the battery and power cable, but do not reconnect any of the peripherals, and power on your computer.

If this was a mere hiccup, the installation process should resume and complete successfully.

2. Loose Connections and/or Driver issues

To Fix:
- Check to see if your display is connected properly to your computer and to power. - If possible, change the video port (e.g from VGA to HDMI). There may be a driver that needs to be updated or reinstalled. - Disable the discrete graphics card, switching to the integrated one -- this'll tell you if it's your graphics card or the drivers used for it. You can uninstall and reinstall the drivers to see if that helps. If not, I would check to make sure everything is connected to your discrete graphics card properly -- [ASUS Nvidia GT710 Installation][1] (This is just the first video I found, but there are plently more if you need them.) - Try a different monitor and/or cables -- yours could be dying, have a bad connector, etc.

• If the computer isn't detecting the display, then you can try using the Windows key + P keyboard shortcut, press P again and then Enter. You'll need to repeat this steps a number of times to cycle through all screen options.

• [...] use the Windows key + Ctrl + Shift + B keyboard shortcut to wake up your display.

3. Something connected to the computer is causing problems Disconnect everything you can so you're only left with the essentials -- i.e. tower, keyboard, mouse, monitor -- restart, then slowly reconnect things one at a time until you find the one causing the problem. Check the drivers for the device, update (and/or reinstall), and restart. If it's still a problem, you'll need to troubleshoot with the product's support center.

4. Other (more complicated or obscure reasons)

To Fix:

• Reboot into Safe Mode
  Use the troubleshooting tools in the advanced startup menu to try to track down the problem
• Backup your computer and do a clean reinstall. (It's far from ideal, but it can fix errors from a corrupt OS; and I have found this has worked for me before when Microsoft Support couldn't figure out what was wrong.) You can migrate over your files, settings, etc. if this solves the problem.
• Check if the GPU is referenced properly in BIOS. Someone else had this problem.
• Try Rolling back the Integrated Graphics Driver

Primary Source: How to fix black screen problem on Windows 10