Can you please provide more information about the issue you are experiencing? Is there a light on the Roku device? How are you powering the Roku device? Is the device plugged into the TV USB port or is it plugged into a wall outlet? What are you seeing on screen? Have you tried connecting the Roku device to another TV to see if you are experiencing the same issue?
With more detailed information, we will be able to assist you further.
"No signal" messages typically come from the TV when it can't find a signal in the TV's input you are currently viewing. Obvious I know, but just to cover all bases, make sure your TV is set to display the same HDMI input port to which you have connected the Roku.
Have you tried restarting your Roku? You can restart by pulling the power plug to the Roku for a minute or so then plugging it back in.
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X
I have the same problem with Model 3810X Stick and have done everything suggested above in responses. I have change batteries in remote plugged unit in several different ways, changed HDMI cables, cable connections but no signal error continues. The remote has a tiny light which does not go on at all. We have swapped out with other ROKUs. It just died. Is there a reset or something I can do short of replacement. The stick is barely a year old. Do I just toss it and move on? Help. Thanks! #3810Xstick