Many people have issues with their Garmin GPS 420 freezing up when they plug it into their computer. The firmware on your device may not be up to date, causing your device to freeze.
First, try unplugging the device from the computer, and plugging it back in. If your device is still frozen or your computer won’t recognize it, you must update the firmware. To do this, follow the below steps:
- Go to the Garmin website, and find the latest firmware update for your device.
- Download the update to a folder or your desktop. The firmware update will be an .exe self-extracting file.
- Double-click on the file, and run the program. Save the program files to a folder other than the C:\Garmin folder, especially if you have other programs already saved in this folder.
Run the Firmware updater. To do this, you must follow the below steps:
- Press the power button and the Up button at the same time, and hold down both.
- Double-click the Updater.exe program.
- Press OK.
One issue with this process is that the Garmin GPS updater may not recognize your 420 GPS. If that’s the case, call Garmin customer support. They will give you a keypad combination that you must press on your device. This gets around the problem of the firmware updater not recognizing your device.
If the updater did recognize your device, but your device still isn’t updating, try the below steps:
- Follow the first four steps from the previous instructions, except don’t let go of the power and Up buttons.
- Run the firmware update, and wait until the update is completely finished. Be prepared to hold down these buttons for a few minutes since it can take several minutes to update the firmware.
- Let go of the buttons when the firmware update is done.
Your computer should now recognize your Garmin 420, and the device should stop freezing.