20 Most Recent Garmin Approach G3 Handheld GPS Receiver Questions & Answers

There are many reasons for a GPS to fail to acquire signals from the satellites. You should be outdoors with a clear sky the first time you attempt to get it to work. If it's worked before, but stopped working, it may be defective. Garmin recommends many thing to do at this link: https://support.garmin.com/faqSearch/en-US/faq/content/YyCZrQHhuf6PO6qTKdvvr9

go to static.garmincdn.com. you get one free download there

Your GPS MUST have line of sight to the satellites.
Are you in the garage or is it a very cloudy day.
Also tall buildings can block some sat view the GPS must have at least 3-4 to work most link to 7-9 all the time. GPS do not work well in metro areas too many tall buildings.