@kgerard
If you are currently using the TV's USB power port, try plugging the Roku device into a wall outlet using the USB wall power adapter. If your device did not come with a power adapter, try using a cell phone wall charger adapter. (5volt, 1amp).
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102