Hello & Welcome to Just Answer,
Sorry to hear of the issue with your GPS.
You didn't mention the EXACT model of your Etrex, but MOST of the devices come with a USB or other connector that allows you to connect the device to a computer - as transfer any "waypoints" or tracks you may have stored in the device to a computer file.
For these units, there is a program called BaseCamp that can be used to get those waypoints from the device, and then transferred to a different device.
Please let me know if you have a device with a USB connector, and can get that program onto your computer and communicate with the device.
Thanks, ***** *****
I see it has been a few days and I just wanted to follow up to see if you have any more questions concerning this issue or if the issue was resolved.
I look forward to any further questions or results that you may have.