Hello, so I have a Nintendo Switch and I want to record some stuff from it. I have a recording device to be able to do so. (But it doesn't have pass though hdmi which is why I have a splitter). So I have the HDMI cable plugged into the input of the splitter box. Then I have one output to the monitor and the second output to the recorder. The thing is that when I look at the monitor with the Switch on and plugged in, I see a black screen. Do you know how to fix this?