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In some cases, the USB power provided by the TV is not sufficient to power the device. Even though your Roku device may appear to be working, running with insufficient power can lead to instability, crashing, and other unpredictable behavior. We suggest using the included USB cable and USB power adaptor (if included), connect your streaming player to a working power outlet in the wall. If your streaming player did not come with a USB power adaptor, see our article on powering your streaming player.
Additionally, connecting to a power outlet in the wall has the additional advantage that your Roku streaming player will not need to power-up every time you turn on your TV. This means your player will be up and running faster than it would connected to a TV.
You can see more here: What to do if the red light is flashing, or you see a "low-power" warning
Keep us posted on how it goes.