I got my roku premier 3920X for Christmas and was working beautifully until a few days ago. I got it brand new too. I have Change the HDMI cable, I have checked to see if the HDMI cable and power cable where placed in correctly. I have tried resetting it and everything and my tv still says no signal. I even tried the roku device on my other TVs and other people TVs and it still won’t work. #roku3920x
At this point I feel like switching to fire stick. #what do I do
If you have changed your HDMI cables, tested on other TVs and still getting no signal, then most likely device issue failure.
Only other 2 suggestions I have is to make sure you are plugging the Roku device into a power adapter into the wall, not TV directly (if you haven't already) and try the final resort of a Factory Reset. (Using a paperclip, press and hold the Reset Button for 30+sec)
An underpowered device can lead to damage and premature failure. Other times, just luck of the draw and a bad device. Haven't seen many resolutions for this issue if both the power adapter use and factory reset fails to resolve it. (Of course, sometimes a bad power adapter can also contribute to issue, so any 5V, 1 amp power adapter can be used in its place).