This is usually caused by an insufficient power supply. If you received a USB power adapter with the device (it would help to know the model number written on the Roku device), use it. If it's the Express that doesn't come with a USB power adapter, make sure the one you're using can supply at least 1 Amp. Look at the fine print for something like, Output: 5V 1A. Anything greater than 1A (or 1000mA) is OK. Note that some TVs with USB ports cannot supply enough power.
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.
