Idk If a AV Splitter Works On Any Roku TV So Does a AV Splitter Work on Any Roku TV?
What are you trying to accomplish? There is enough ambiguity in the question so that a definite answer is not really possible.
Perhaps others are gathering something that I'm missing.
The RCA's on a Roku tv is an input, nothing to split. You can't use a av splitter to hook up two sources to one input. You need an av selector.