I have a new streaming stick+ and it was working fine for a few weeks, then it started showing no signal when I turned on the TV (with roku remote) , sometimes the Roku menu would pop up after a minute or two of pressing random buttons, or turning the TV on and off. However now when I am watching some shows the screen goes black and I get the no signal issue.
Nothing I do can get the Roku menu to come back. I end up turning off the TV and leaving it (Roku is on a 2nd TV) till the next day when it works again. The issue is slowly getting worse so can see it continuing to get worse till the stick is useless.