Why does the projector say "Not Supported"?

Question

Iron

There is a working laptop without a VGA connector on Windows 10, a projector with a VGA cable and an HDMI-VGA adapter. I connect the projector through an adapter to a laptop, the laptop blinks and displays the connection of a second monitor, but the projector on the blue screen displays the inscription "Not supported" and hertz. I changed the screen resolution and display modes - it did not help. How to solve this problem?

Answer 1

checked on a normal monitor with a D-sub output?
what vendor's cable?