Hi @mannermauler ,
Here’s a link to the service manual for your laptop, taken from this webpage
Scroll to p.73 to view the necessary pre-requisite steps and then the procedure to remove the power adapter port. (Their name for the DC-In jack)
Replacements are available online, just search for Dell Inspiron 17-3721 power adapter port part to get results. Here’s a link to just one supplier of the part. It is shown only to give you an idea of the cost of the part and also the various Dell models that the part is compatible with.
Hopefully this is of some help.
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
2