Yep, same here. It's a really strange problem. Mine stopped charging with the oem cable maybe a month after I got it (tried tightening the screws on the port, which did feel a bit loose), but still had problems with charging. The OG cable does
however mount the phone on my computer for odin / file transfers so I just got a wireless charging module and charge my phone that way. Adding further to the mystery, I just ordered this micro usb 3.0 hub: http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
but I haven't bothered to try it out until right before posting this (I had a pack of 10 micro usb 2 port covers and I'm down to like 2 because I frequently lose them when I take them out; wish I could find one that attaches to the phone, like the one on the S5, anyone know where one could obtain such a product??) Anyways, the hub works fine, plugged my ps3 controller and a flash drive into usb ports on the hub and it worked no problem.
So, the port seems to work for anything except charging with the OG cord (just noticed that it does actually charge if I plug a power cord (not included) into that hub. The OG cord doesn't work anymore for charging, but provides a perfectly stable connection to my PC. So, in conclusion: