So there are several posts on this matter but do not specifically answer my question. On one tv, roku works fine. On another tv, where i need it, it is not recognized. The light does not come on. I use direct tv and a blue ray player in the HDMI ports in question. Everything works independently but the two are not working together. Why?
The tv it works on is a 2.5 year old jvc that came with the roku stick in the box. The tv that roku does not work with is a ruffly 6 year old Panasonic with 3 HDMI ports. All that work with other devices.
Yeah, what jeffrok said. Roku had some deal worked out with some TV manufacturers that included MHL ports (a variation on HDMI, to put it simply) that would run MHL Roku Sticks. This was some years ago, as the MHL Sticks (models 3400, 3420) went out of production four years ago.
As was said, those Sticks will only work on TVs with MHL ports. Many of them said "Roku Ready" on the box.
Basil https://www.basilsblog.com/ Roku Ultra (4660) Apple TV (5th gen), TiVo
Previous: Roku boxes from every generation. Apple TV (2nd, 3rd, 4th gen)