The RCA jacks are...composite? Can't recall the term exactly.
You can't go from downgrade to upgrade on cabling, and on those cables, four feet you run into noise levels to make the picture unusable.
I have an HDMI ported HD flatscreen someone gave me. I didn't even know for two years it was either..always used the coax.
I am trying to run computer output to TV so the old train (British) steam YouTubes can be seen.
I found out I need a much better video card (not driver) with either an HDMI port (preferred) or a..DVI? port, bigger than HDMI.
Updated drivers won't work, and long runs of cabling on RCA ended cables won't work.
That's what I was told very recently.