RE: Dell XPS 15 Plugged in but not charging
Please list exact Dell model number and version of windows. Ex: Dell XPS 9550, windows 10.
You could type msinfo32 onto the search box to get the system information. In the meantime, I'd suggest you check the status of AC adapter and Battery's health in the BIOS by follow steps below:
1. Power off system.
2. Power on system, quickly start tapping F2 key continuously. You should be in the BIOS. The status of adapter usually listed under the main screen and Battery health listed under the Advanced tab or Battery information.
The adapter should say the adapter type, if it says 'Unknown' or 'None', then it's a issue with the adapter, and most likely needs to replace with a Dell genuine adapter that suitable for the system. Note: Wiggle the adapter's end while checking it in the BIOS. The battery health should say Excellent or Your Battery Is Performing Normally