Had the same issue with the TV in our living room. Thought the TV was fried so moved the fire stick to the bedroom and began having the same problem with that TV - different brands of TVs. So followed your advice. Unplugged TVs, unplugged all HDMIs, took batteries out of all remotes. Then held down power putt on on TVs to reset. Then plugged TVs back in and plugged in Directv boxes back in and put batteries back in those remotes. Both TVs are fine hallelujah! Did not plug back in the Firestick to either TV and did not put back in its batteries. Would much rather replace our firestick than 2 TVs.