07-30-2017 08:19 PM
I've had a 55D420NA16 for a couple of years and every remote that I use for this TV suddenly stopped working. I have the original remote and two universal remotes that I have used to control it. None of them work any more.
It can't be the batteries or a malfunctioning remote because both of the universal remotes still work for other devices (and the batteries in the original remote were tested). I tried cleaning the sensor (at the bottom right of the TV), but that didn't change anything.
Does anyone know what could be causing this?