The charger LED cycling on for about 12 seconds and off for about 2 seconds points to a charging or power-supply connection problem rather than a normal charging state.
Try these steps in order:
- Reset the power supply
- Disconnect the charger from the Surface.
- Unplug the power cable from the wall.
- Disconnect any USB accessories.
- Wait at least 10 seconds.
- Clean the connector with a soft, dry, lint-free cloth and check for damage.
- Plug the charger back into the wall and then into the Surface.
- Reverse the Surface Connect plug
- Remove the charging connector.
- Flip it 180 degrees.
- Reconnect it securely.
- Check whether the LED becomes stable and whether charging starts.
- Charge with the correct Surface power supply
- Use the power supply designed for the Surface Laptop.
- If charging over USB-C, use a USB-C PD charger that provides at least the same wattage as the original Surface power supply.
- Disconnect accessories
- Remove USB devices, SD cards, external monitors, docks, Type Cover, and other attached accessories.
- Accessories can prevent startup or draw too much power.
- Leave it connected for at least 15 minutes
- With the correct charger connected, let it charge for at least 15 minutes before trying to power it on.
- Try startup recovery steps
- Press Windows logo key + Ctrl + Shift + B with a keyboard attached or using the integrated keyboard.
- Then try a forced restart by holding the power button until the logo screen appears, about 20 seconds.
- If it still will not charge or start
- If another known-good Surface charger or USB-C PD charger also does not work, the next step is a service order for the Surface or the power supply.
- If the charging port, connector, or cable shows physical damage, service is recommended.
Important warning: if attempting the battery-driver uninstall method later, do not do that on Windows Arm-based devices such as Surface Laptop (7th Edition). On those devices, uninstalling battery drivers can require a full system reset to restore them.