If your surface pen is not working, try the following: -Check to see if the pen is plugged in. If it is, make sure that it's plugged into a power source. -Make sure that the battery is charged and inserted correctly. -Make sure that the pen is not broken. -Make sure that the pen is not dirty. -Make sure that the pen is not in a case. -Make sure that the pen is not in a pocket or bag. -Make sure that the pen is not in a case. -Make sure that the pen is not in a pocket or bag. -Make sure that the pen is not in a case. -Make sure that the pen is not dirty. -Make sure that the pen is not in a case. -Make sure that the pen is not in a pocket or bag.