CDJ link port replaced, still doesn't work

Old link port was loose and wasn't responding, so I had it replaced (with an official RJ-45 part).

Powering the deck back on, everything works perfectly, EXCEPT THE LINK! 

I'm starting to wonder if the entire motherboard needs to be replaced. Maybe it's the joints on the board are damaged? 

Is it possible the the board needs to be replaced even though everything works perfectly except the link?