Quick video how to do a soft & hard reset based on whether or not you need to reboot the device if it freezes up or to wipe all the user settings.
3 ways to reset the device.
LAP + MODE = Soft reset HOLD for 7 seconds or until the screen goes blank.
The second way (Hard reset)
MODE + POWER = Hard Reset, you will see a prompt to erase all data. This should reset your device just like it came out of the box.
The third way (Master Reset)
LAP + POWER = Master Reset. Turn off the device and do this key combination. It should do the same thing as the 2nd method.
Watch more forerunner 310 tutorials
http://www.youtube.com/playlist?list=PL81497FCDE32425EC