2023 Beacon 41LKB. USB port in cabinet next to theater seats has stopped working. I found a fuse in the 12V fuse block labeled USB. Pulled the fuse and it was blown. Put in a new fuse and t blew immediately so pretty sure I have a short somewhere. Not sure where to start. Has anyone had this problem or have any suggestions on where to start. I’m not very good with electrical. Any help is greatly appreciated.