My GS5 has been working fine with a retractable charge only cable to the USB on my PC for months. It's certainly not a fast charger, but it worked. Earlier this week I noticed that plugging the phone in did nothing though the phone indicated it was charging with the lightning icon. I tried 2 different cables today and both would connect and try to go into installer mode as well as display the charge icon but neither worked. I can charge with these cables in my truck and with a wall charger. I tried a couple different ports and a different PC without it working. Any suggestions what I need to do in software on the phone to make it work again? I assume this has to be software since it worked find last week and will charge on a normal 5V source.