I believe I’ve already responded to somebody earlier. They were going to send out a new cord to me. I had to borrow a charging cord from another electronic device. The cord & plug/adapter that it came with it has been in place & plugged into a surge protector since I bought this Roku.
To go back to what I did to find out that it was the power cord &/or adapter.
I started with a settings review.
Then I refreshed my network a couple of times.
Rebooted my router multiple times.
Moved my router close.
Then began to troubleshoot with the power cord.
Since I started using the borrowed cord and adapter it has worked flawlessly.
I notice that other people have stated that it’s very sensitive the power.
It worked fine for months and then out of the blue it stopped. It’s not a heavily used television but it is used regularly.
I hope this helps someone