Black screen in every game. How to fix?

Question

Iron

The last few days in all games, a black screen appears after 1-2 minutes after launch, in some, a black screen appears immediately at the moment you click on the game shortcut, when it starts to start, regardless of the complexity of the game, even in the simplest ones. there is no cursor, the sound is played without freezing. when you press tab + alt, nothing happens, alt + enter does not go into windowed mode, initially I tried updating the drivers, it didn’t help, then I tried to roll back, it didn’t either, then I took them down and reinstalled them, it didn’t help, today I reinstalled Windows again, The problem is still there, everything was working fine before. What could be the reason and how to solve it?
System Data:
NVIDIA GeForce GTX 970
Intel Core i7-4790 3.60GHz 8.00GB
RAM
Windows 7
motherboard MSI B85-G41

Answer 1

The video card is to blame for its replacement.