"Released 2016, October" so some owners will still be in warranty. You can try a factory reset (see manual or google it).
In a pinch? Try some USB MOUSE.
https://www.google.com/search?q=how+to+use+USB+mouse+on+android+phone+OTG+CABLE
my LG V20 lost its ability to recognize my touch or my fingerprint. The screen is opaque, but see-able and it sounds when a message is sent to it. It just doesnt respond to my touch

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