My Roku has a blinking white LED as if I am pressing a button on the remote over and over. It also acts as if the last button pressed is being held down (so very annoying to use). I can remove batteries from the remote and it keeps happening. I can also see from using my phone camera that the remote is only flashing once per button press (phone cameras can see the infrared light).
Have tried power cycling to no avail!
Any suggestions?
I'm assuming this is a Roku TV ...
You've removed the remote from being considered the source of the problem by finding the problem continues with no batteries in the remote.
Try placing something in front of the IR sensor on the front of the TV (or better yet some opaque tape over the sensor) to see if this stops the problem. You may have to bring your remote right up to the TV and experiment to find the location of the sensor.