First, check if the charger is properly powered and try using another charger for testing. Confirm whether the USB-C interface of the device is blocked by dust or foreign objects, or physically damaged. Check if the connections between the cable, device, and charger are secure, and try re-plugging. If connected via a dock, ensure that the dock is properly powered and functioning well. If all of the above are normal, there may be an internal fault with the cable, and it is recommended to replace the cable.