Make sure that the voltage selector switch is set to the correct setting. See Question 3 for more information.
Check the polarity of your device. See Question 6 for more information.
If you connected your device with a tip, make sure that your device’s input does not require more than 1300mA (1.3A) of current. OR If you connected a USB device, make sure that your device’s input does not require more than 2100mA (2.1A).
Make sure that you have selected the correct tip. See Question 7 for more information.
Make sure that the tip is connected to the connector securely. The tip should be flush with the connector.
Make sure that the adapter is connected to a working power outlet. If you are using a power strip, make sure that it is turned on.