Carefully rotate the keyboard ever so slightly to get access to the faulty USB Port.

And there we have it, that pesky little bugger. Now resolder and reassemble and you're good to go.

This bigger keyboard has two hooks at the inside of the plastic compartment so you can just snap it back in place.

With keyboards that don't have such hooks you might need to tape or superglue the parts back together.

Congratulations, you have (hopefully) successfully repaired the USB Port.