Solved Xps 13 9360 Plugged In Not Charging Adapter Not Recognized Page 2 Dell Community from www.dell.com
Dust or dirt inside the USB port on your device might be preventing the charger from being inserted. This is the common problem. I would guess that the brick is just getting worn out.
If it works fine it indicates that the AC adapter is the element to blame.
Please check it by yourself. If Dell laptop wont turn on after these steps try other things. Please check it by yourself. The charger isnt powerful enough to charge your PC.