@PERSIS, what do you mean by "Turned off the roku prem box"? You can't really turn off a Roku device. If you have a power button on your remote it doesn't affect the Roku. Did you physically unplug the power for several seconds and then plug it back in?
Download the Roku “Remote” app to your phone. Use it as your remote control and it should work.
Download the Roku “Remote” app to your phone. Use it as your remote control and it should work.