Reminds me that my 9 year old granddaughter saw me frowning and asked what was wrong.Looks like another digital tool that was just ahead of its time. Someone should rethink the idea and update it so control could be done from a durable touchscreen you could mount wherever you want. It could even be an AP you run on your phone for that matter. JMHO
I've read on line quite often with a condition you describe to take the switch apart and clean it.I have one also. It still works but occasionally it does not respond. I have to press different buttons, turn it off and on, even had to unplug and plug back in to get it to respond. I am guessing parts are no longer available. I don't want to think about going through the selection process for a new table saw.