If your Garmin device starts experiencing issues, such as a glitchy app or issues syncing with your smartphone, you can usually solve the problem by restarting your device. To do this, follow these steps: - Press and hold the power button on your Garmin gadget for a couple of seconds until the screen goes black. Press the power button again until you see the Garmin logo. Now your device should now be restarted. If not, try pressing the power button again.