Hi @mrfixer2011 ,
Have you checked that there is 19.2V DC at the charger’s output plug, you didn’t say?
If the charger’s output voltage is OK but there is no voltage on the motherboard it may be a faulty [https://www.ebay.com.au/itm/DC-POWER-JACK-CHARGING-CABLE-FOR-Acer-Chromebook-14-CB3-431-C0AK-CB3-431-C7M1-CD/283696150107|DC-In jack] (supplier example only to show what the part looks like and the cost).
There are videos on YouTube that show how to replace the DC-In jack in Acer Chromebooks that may help.