Please send me a PM with your Roku account email address, and include the serial number of the Roku device that you are getting the low power message from in Settings>System>About. I'll be able to assist you further from there.
What are you plugging the power supply cord into -- into a USB port on the TV or into the supplied power supply adaptor which is plugged into a house socket? Some tv USB ports may not provide the needed power level for the Roku.
Roku Streaming Stick +, 3810X, Ser YH0059427035, wifi - Samsung UN55ES6100
Roku Streaming Stick, 3600X, Ser 5S56D8240827, wifi - JVC EM37T
I purchased a Roku Express one year ago. It has begun failing every time I use it. I get two messages: insufficient power (USB port on your TV will not power this device. Please use a USB power adaptor); and a message about checking the source. I am using the Roku-supplied power adaptor and cord, plugged into a power source. I have tried switching ports in the back of my Samsung TV. Nothing works. HELP!!!
If the issue is still not resolved, please send me a PM with your Roku account email address, and include the serial number of the Roku device from Settings>System>About. I'll be able to assist you further from there.
I've got a Roku Express that gives me the "Low Power" a few times a week, even though I'm using the supplied adapter / cable. I've tried other adapters (apple, etc) and cables and it doesn't seem to fix it. A quick removal and re-seating the power cable itself solves it, but it's very annoying.