my USB connector on the S4 has broken. The inner plastic casing that housed the metal pins has broken off. I’ll take a photograph and post it also, in a minute.
Has this happened to anyone? And is it easy enough to fix?
Yep the whole connector will need to be replaced. It is a simple job for anyone handy with electronics. The part is a standard 4 pin USB type B PCB component. The part costs about $2 and the labour should only be $50-$80. Find your local electrical repairer and give them a call.