Hi James Miller
Some suggestion
https://www.ebay.com/itm/DC-Power-Jack-W-cable-Dell-Inspiron-5559-15-5559-8vz5gc2-Charging-Port-Socket/232643386658?epid=2284775580&hash=item362aa05d22:g:uVEAAOSwoRBaZNha
https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20180604170259&SearchText=Dell+Inspiron+5559+power+jack
Purchase this part and open up the laptop to do a replacement