Chosen Solution
The screen of my Microsoft Surface Studio (1st generation) suddenly has turned black and does not work anymore. The computer itself works, because if I connect a monitor to the mini-display port, I can see Windows and the system is functioning fine. This way, I discovered that the internal screen is not recognized by the Nvidia card. However, I can still authenticate with Windows Hello, use touch to move the mouse, use the camera, play sounds and see that the backlight is working. The only problem is that the screen stays black. I have tried to forcefully shut down the computer several times (by pressing the power button for 10 seconds), start in BIOS mode (by pressing volume up and powering on), tilting the computer, changing the position of the screen, etc. - nothing works. Clearly, something is broken - but what?. Is there anybody who can give me some ideas what might be wrong and where to start looking? The warranty has already expired.
I solved the issue with my Surface Studio and now realize that I should have shared my findings sooner. It turned out that a connector was loose. To find this, I opened the computer on the bottom, following the iFixit video (starts at 0:29), removed the midframe, fans, SSD, heatsink, HDD and power supply and verified if the connectors from the screen to the main board were properly fitted. This seemed to be the case, but I disconnected and connected again to be sure. Then I removed the plastic cover on the backside of the screen to verify the connections on the other end of the cable. After carefully removing the plastic (2:22 in the video), I was able to locate the connectors and it looked that one of them was not properly attached any more. After disconnecting and reconnecting all connectors, the screen worked again. Please note that I did not open the display and I did not remove the zero-gravity hinge! My Surface has been working flawlessly since then. I hope this helps!
Try holding the Vol + button and then hold the power button down for about 10 seconds. This should hard reset the computer. If this doesn’t work then check to see if the display backlight is out by shining a light on the display and look for icons and words. If it is still blank then the display may be faulty. You can check with Microsoft to see if it is in warranty at https://Mybusinessservice.surface.com.