I am having this problem as well.
Last week my Roku stick was fine.
This week, it won’t connect. I tried the factory reset button. The led light never came on to indicate if it reset or not.
when I use the roku app, it recognizes that the stick is there, but won’t connect. I have done all of the unplugging and turning off of routers, modems, wifi, and replugging and turning back on.
Same issue and they sent me this replacement before christmas 😡 this sucks
It looks like roku express has issues ,mine worked for 2 months and now is dead ,no light nothing......I had many rokus never had problem... unfortunately can't find the receipt..so I m stuck..