I spent a fair amount of time getting my Genos to display lyrics on a Smart TV.
Outputting to a dumb display is easy: Connect the USB to device port to a converter (I use a Diamond Display Adaptor), then connect to one of the ports on the display (DVI, VGA or HDMI). This has worked every time.
However, a Smart TV is too "smart" for this connection. In order for the Genos to output lyrics through the USB port, it has to believe there's a display at the end of the cable. A dumb display works fine. But a Smart TV checks for input, and if it doesn't find any, displays the "no input" message, check the cable, power, blah, blah blah.
So the keyboard won't output unless it believes something is listening, and the TV won't listen unless it believes there's something to be received.
The solution? Connect the Genos to a dumb display. Turn the power on. Now it will output the lyrics. Now switch cables to your Smart TV. As there's something being outputted, it will receive it.
Annoying, but it works.
Fred