Hello,
Is your problem Solved?
I have the same problem with my PC monitor. It goes black sometimes. Previously I thought that it was a cable issue. So, I changed the HDMI cable and brought a new one. But it doesn't solve my problem.
Then I called their service center person and he told me that your windows or maybe the drivers are not updated. Actually, I was using the outdated windows and hence it was creating that black screen issue.
Maybe in the case of yours, The problem lies in the Drivers or Windows. Please check them. You can follow up with this
guide to solve this black screen issue.
Let me know If your problem getting solved or not.
Thanks,
Jeffer James.