Hi Tom Burke2,
Thank you for reaching Microsoft Community. We're sorry to know that your Surface device stopped charging.
Does your Surface currently turn on?
If the LED light on the power connector is off, make sure the connector is connected securely to the device. Check cables and reset your power supply unit: Disconnect the charger from your Surface, unplug the power cable from the power outlet in the wall, and then disconnect any USB accessories.
Wait at least 10 seconds. This gives the charger time to reset.
After that, clean the connector with a soft, dry, lint-free cloth, and check for any damage. (Replace damaged cables.) Plug the charger back into the power outlet and your Surface. Then turn on your Surface.
Plug it in the other way: Flip the connector on the charger 180 degrees, and then check to see if the LED light comes on and determine if your Surface starts charging again.
Try using USB-C PD charger if you have one available. USB Type-C PD charger needs to be rated at the same wattage or higher as the power supply that came with your Surface.
Let me know how it goes.
Kind regards,
Lavenia