Without model numbers of the TV and Roku you can't get an exact answer.
If the Roku output doesn't match the inputs you have on the TV you either need to get a Roku with the correct output or a video audio converter for the Roku you have.
Without model numbers of the TV and Roku you can't get an exact answer.
If the Roku output doesn't match the inputs you have on the TV you either need to get a Roku with the correct output or a video audio converter for the Roku you have.