I'd like to switch my Touchsmart 600 LCD screen signal source to the external composite video input

[MyDeeQuinn]

I'd like to switch my Touchsmart 600 LCD screen signal source to the external composite video input, but without Windows Media Center (which is not supported by Windows 10) there doesn't seem to be any way to do this anymore.  Anyone have a good solution (or even a bad one that works reliably :^)

[itsmyname]

@MyDeeQuinn -- is this your 2010-vintage computer: HP TouchSmart 600-1220 Desktop PC Product Specifications | HP® Customer Support

The image of the left side of it shows various "video input" ports, including HDMI, and some other ports that are too small in the image to identify.

Can your device that is sending video-output to your computer send via a HDMI cable?

[MyDeeQuinn]

The other inputs are the Audio L & R and the Composite Video, which is what the device I am using to create the "video input" is producing, not HDMI.  I suppose I could get an HDMI to CompositeVideoPlusAudioLR converter but I think the real problem is that without the Windows Media Center App (no longer supported by Windows 10) there is no mechanism to switch the PC screen from normal PC display to instead use the "video input".  I did try to download the Windows Media Center App to my PC (running Windows 10) but the various "help" videos I found for doing this weren't very clear and when I tried the clearest one the resulting WMC App wouldn't start up.  So I'm hoping that maybe some clever HP TouchSmart 600 owner figured out a more direct way to switch the "video input" source.