Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
Other then the device not acquiring a signal. It does turn on and otherwise function?
If so, all we probably need to do is some maintenance.. A two step procedure.
So lets start with this,
To perform the master reset:
Power Approach offPress and hold on the upper left side of displayPower device on while still maintaining pressure on displayRelease on display when Do you really want to erase all user data? message appearsTouch YesThe Approach is now reset. Leave the device outside with a clear view of the sky for a minimum of 20 minutes to acquire satellite data.
Then... We need to update the software in the device.. To do so, you will need a Mac or a PC.. Then, go to this site and download Garmin express, its free.
Once downloaded and installed, open and run garmin express. T hen connect the G6 to the computer and turn it on. Garmin express will see it and allow you to update the software.. Once complete, your device will be able to find the satellites again and work normally.
If you get stuck or run into any issues, let me know.
I strive to provide great service, and greatly appreciate a 5 star rating clicked and submitted when you are satisfied. If you do not submit a rating, I am in no way credited for my time. I always answer follow up questions.Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.