OK, having looked closely, there were loose connections on the actual pins and one of the pads had came off completely. Probably from the force of plugging in the usb cable when the two side pads weren’t connected. So I carefully removed the usb port and reconnected it nice and straight. I don’t recommend this to anyone who is new to soldering, it is very small and difficult, I had to remove the down button just to be able to get into it.
Anyway, either that missing pad wasn’t needed or there was still enough of it left to complete the connection as it seems that the USB port is working correctly. However, the large pad on the left came off during the process, so it’s only secured on one side.
 Nope, the second time I plugged in the cable, the whole thing came off, ripped all of the solder pads off completely.
I assume that there are no other contacts on the board for the USB?