Solving playback issues

[mjvr2c]

From My Manual also on their Website. To get started, connect your Roku Streaming Stick+ to an available HDMI port on your TV. If you plan to stream movies and TV shows in 4K or HDR, remember to select an HDMI 2.0 port that supports HDCP 2.2. Learn what to look for when trying to identify an HDMI input that supports HDCP 2.2.

If your Roku Streaming Stick+ will not easily connect to the HDMI port on your TV due to space restrictions, then you may wish to get a free HDMI extender cable.

Next, plug the USB power cable with advanced wireless receiver into a suitable power source – either the USB port on your TV, or preferably, a wall outlet (when used with the USB power extender cable and power adapter).

[Strega]

https://image.roku.com/c3VwcG9ydC1B/RSS4K-QSG-US-Fall-2021.pdf

"For the best streaming experience,
use the included USB power cable
and power adaptor to connect your
streaming player to a wall outlet."

In any case, when something goes wrong, swapping from a TV USB port of unknown power to the included adapter is just the most basic form of troubleshooting. You simply do it, determine the result, and move on from there.  If both power sources have the same issue, then the chance of the problem being in the streaming stick itself is much greater.