... seeing the "dancing ROKU" on reboot and then black screen. ...
I'm guessing the Roku is sending a signal in a resolution which the "problem" tv does not support. If that's the case, you should see the normal "bouncing letters" Roku startup screen, but lose your picture when it tries to load the home screen.
I'd suggest trying the Roku on a different TV if one is available, especially if that TV has a working Roku. If it comes up okay there, go into Settings > Display type and change the Roku to the actual resolution of the "problem" set instead of a different resolution or the "auto" setting. When you get to the countdown screen click on the "yes" option to save this setting to the Roku. Now move the Roku back to the "problem" set and see if it works.
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
Hi, I am having the same issues. I only have my Roku streaming stick ultra for a few months. Tried to turn on tv 2 days ago and I received the "No Signal" message. Tried everything I could find on Google. I went as far as putting it on different tv and still no resolution.
I’m experiencing the same issues as many others on this forum.
I have many Roku Ultra’s in my home, it my guest room Ultra has stopped working. I’ve tried everything suggested above and in other links and get no response from the unit, just black screen (no signal being sent). The unit also does not show up on my device list within the app.