I spent about a week troubleshooting this issue myself. I have only had Roku Express for about 3-4 months, and it has gotten to a point where it's not recognizing my remote. The very first thing I did was switch out the batteries. I was able to turn my TV on by hitting the home screen button... and that was it. My TV and Roku were able to power on, but I still could not navigate the menu. I reset the Roku itself. It was working for a day, but the remote and the box have to be intimately close together. I even made sure that nothing was blocking the box. The next day, my friend pointed out that it was hot to the touch. So I unplugged it completely from the TV and power strip. It remained unplugged for 2 days, and still no improvement. I am just wondering if I need to replace the hub or the conrtroller.
Thanks for the post.
Can you please specify which Roku Express model you are using?
For more information about remote troubleshooting, visit our Support page here: Fix your remote
Please keep us posted what you find out.
Thanks,
Danny