I was learning how to install/side load apps/channels on my Telstra tv box which uses Roku, I figured out how to enter development mode but couldn’t find anything cool to install, these are the key combinations to press on the remote:
Home three times, then
Up two times, then
Right once, then
Left once, then
Right once, then
Left once, then
Right once.
...
https://www.youtube.com/watch?v=OQq6NEQZWws