The USB port on Premiere is only used as a power connection. I don't know about the USB port on your Sony but the USB port on many tvs doesn't supply sufficient current to run a Roku reliably. It is recommended you use the power converter that came with the unit, plugged into your house power. If you don't have the original converter, most any USB converter you have on hand from a cell phone or other device will work, as long as the fine print on it indicates it will output at least 1 amp.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X
