No discoloration inside the port that I can see. I also opened up the camera and didn't see any discoloration inside the body either, though there was a silica gel packet in there. Tried to attach photos, but wouldn't work so I've uploaded them here: http://s1365.photobucket.com/u.....rary/ipcam
This camera was part of an order from late 2015 or early 2016. It ended up going unused in an install that I did, and had been boxed up until recently when I decided to use it at my own house.