Can I run a coax signal thru a HDMI cable?

[TomK54]

I have a tv with a long HDMI Cable already in place, but have dropped back to a std. Coax cable box. I need a plug adapter only, do they exist?

 

[Mr Soup]

there is no simple plug adapter or dongle that will convert analog coaxial signals to digital HDMI signals. You can get a box that converts one to the other but they are expensive and not worth the investment. I've never seen a TV that had a fixed HDMI cable in place could you provide more information on what kind of equipment you have? Does the cable box have other outputs besides coax? Does the TV not have a coax input?