Our 2016 Serenity, 27' has a USB port in the dvd cabinet, likely just like yours...and it failed. I decided to replace it with:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I removed the 3 cabinet screws enough to twist the cabinet around so I could reach a hand to the backside of the USB. One thing I found after cussing trying to twist off the retainer ring was that all I really needed to do was twist it about a quarter turn, and then pull out the existing USB unit from the front. Then I cut the two wires and connected those to the new USB, pushed it back into the cabinet hole (exact same diameter and flat spots!), gave the restraining ring a quarter turn to secure the hub. Didn't really need to install the two screws because the hole flat spots keeps the hub from turning. Then carefully reinstall the DVD cabinet so as not to disrupt any of the many wires.
Soon thereafter, one of the two USB hubs in the bedroom cabinet between the twins, failed, so I replaced both of them with these replacements, and much quicker knowing about those quarter turn retaining rings.
Easy job, and you might consider replacing all the USB ports now, because I think the standard ones are not very good and will likely fail.