How to Reset a Garmin StreetPilot C330
Reset your Garmin StreetPilot C330 GPS unit if it freezes or if it doesn't get a signal from the satellites for an unusually long period of time. Before you reset the Garmin GPS unit, you can try to fix the problem by rebooting it. To reboot, turn the device off by holding the "Power" button and then turn it on again. A master reset erases all settings and user data from the device. Note that the data cannot be recovered after the reset procedure is complete. A reboot, on the other hand, may fix the problem and save your settings and data.
Resetting the StreetPilot C330
Before you reset the device, disconnect the power and USB cables. The Reset button is located underneath the face plate of the GPS unit. Remove the face plate using the groove located just below the Garmin logo to reveal the button. Hold the "Reset" button for around three seconds to reset the StreetPilot C330. The device turns off; then, reconnect your Garmin to a power source using the power or USB cable.
What Happens When You Reset the GPS?
Reset the GPS unit if the device doesn't receive a satellite signal or is not functioning properly. If you plan on selling the GPS, reset it to erase all of your personal data from it. When you reset the Garmin StreetPilot C330, all settings are restored to factory defaults. Furthermore, all user data is erased from the device; this includes all of your waypoints, routes, tracks and geocaches. The Garmin StreetPilot C330 must have a clear view of the sky for at least 20 minutes to reconnect to the satellites.