Hi,
Thank you for posting your query in Microsoft Community.
I'd be glad to help you.
I would suggest you to follow these methods, mentioned below, to fix your issue:
Method 1:
Please refer to the article, created by Sharath Srinivasa, replied on August 7, 2015, to fix your issue with black screen.
Black screen after upgrading to Windows 10.
http://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/black-screen-after-upgrading-to-windows-10/cf3b4559-67d8-40e0-9cf2-ebf4528e1e78
Method 2:
If the issue still persist, I would suggest you to try automatic repairing the Windows and check, if it helps. I would suggest you to download the Windows 10 ISO file and create a Media Creation tool and then, perform Automatic Repair.
Let's refer to the following link:
http://www.microsoft.com/en-us/software-download/windows10
(Refer to the section "Installing Windows 10 using the media creation tool” in the above article for creating the tool).
Once you have the installation media, follow the steps:
1) Start your computer from the installation media. Insert the disk or USB stick and restart your computer. If you see a message asking you to “Press any key to boot from DVD,” do so. If you don’t see the message, you might need to change the boot order
in your computer's BIOS settings so that it first starts from the disk or USB. When you see the 'Install Windows' page, tap or click 'Repair your computer' link to start the Windows Recovery Environment.
2) In the Windows Recovery Environment, on the Choose an option screen, click 'Troubleshoot'.
3) Click, Advanced Options and then click on 'Automatic Repair'.
4) After this complete the repair and see if you are able to boot in to your computer.
For more information, kindly refer to the below given article:
http://windows.microsoft.com/en-in/windows-10/windows-10-recovery-options
Please feel free to contact us, if you face any issues with Windows.
Thank you.