Use different adapter for LG 25UM65-p
While the current available @ 2.14A is high enough - the voltage at 14v will be too low and it will likely not work. 

If connected correctly it is unlikely (but still possible) to cause damage though since it is a lower voltage. If the connector is wired incorrectly however it will probably fry it in short order and could pose a safety risk.  

So if you aren't sure what you are doing I would not recommend trying this.