Before everyone tells me to check the batteries, or that the remote is bad, let me just say that I get the same results with both the original remote and my comcast universal remote.
Fresh batteries in both remotes and the TV does not respond to any commands. No interference between remote and TV. The TV seemed to have more and more difficulty "seeing" the remote(s), and then one day just stopped responding at all.
TV works fine otherwise using the front panel controls.
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