LG TV- changing from normal like to watch Netflix?

I haven't watched Netflix in a long time and now I wanted to watch it again. When I turned on the LG TV, there was a black screen with the LG logo on it and the words "No signal". How do I change this "image" to this page where Netflix, YouTube… Is displayed.

This is the picture. And here again the two remote controls that I have here:

You appear to be using Fire TV, so you have to switch to the HDMI channel the device is plugged into.

I don't see a button specifically for this on this remote, so I would try the following two. Or alternatively with the home button. (The House). I can also control the various HDMI inputs from the home dashboard.