I have two power supplies, so when one didn't charge when out, I waited until I got home. The one at home did the same. It charged for around 30 seconds, then gave the "plugged in not charging" notification. I tried the remove battery connection and pressing the power button in for 10 seconds method; that didn't work, I then tried updating the Bios, that did not work. More research on the internet, led me to blowing into the power connector and into the connection port, still nothing. I then noted the reference to using a soft brush, I found a small artist's brush and softly cleaned the power port with that. Seems to have solved the problem. It's been plugged in and charging for the last hour, so hopefully that has solved the problem. Thanks and good luck. I must say, I've had this Dell since July 2016 and it has been nothing but trouble. Problems with sleep and losing power, I had to reinstall Windows 10 Pro due to blue screen problems, and now this. I for one, will not be buying a Dell product again.