Which devices work on HDMI?

So I have acquired a Screeneo U4. I can play files from a USB stick via the built in VLC player (which was a nice surprise).

However, I have a Watch ONN chromecast box which is plugged into the wall and is configured. When I fire up the Screeneo U4, I get the NO SIGNAL screen.

I also get the same thing when I plug it into my MacBook Pro 14" 2021. NO SIGNAL with the projector; when I go to the Monitors setting via the top of the screen, it flashes on and off but I am unable to choose it as a source.

Is there a Jedi Mind Trick to getting these devices to work via HDMI? I’d really like to use this to replace the TV so I can watch streaming on it…

Which HDMI port do you use? The side or the back? If you go to the home screen, try to switch between HDMI 1 & 2. Also try the other physical HDMI port.

I gave it a try after shutting down the projector. After plugging in the cable hard (the port is kinda tight) before starting it up, it’s been working with my Chromecast as well as the USB port with a drive attached.

I’ll try my MacBook Pro next

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