Simply press and release the reset button on any unit to force it to restart. This is essentially the same as power cycling the unit.

There may come times when you need to revert a device to the settings it has out of the factory. Doing this will erase any settings that have previously been applied.

Press and hold both the Setup and Reset buttons for a second, then release the Reset button, but continue holding the Setup button until the Power LED begins to flash quickly.
After the power LED has started to flash, you can release the setup button and the device will reboot with factory settings.