Joined: Aug 2010
Posts: 12,750
Likes: 2,111
From: Madison, WI
Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.
A GPS when new does not know the time or where it is. It often can take quite a few minutes to figure that stuff out. If your battery ran all the way down, you might have the same situation as a new GPS. Try it for 15 to 20 minutes where there is a clear view of the sky.
GPS units often are poor in accuracy for the first 10 to 20 minutes after not being used for a while, the GPS has to load updated info from the satellites on their orbits. That is why I suggested you try it for 15 to 20 minutes.
If that does not do it, then see if your firmware needs updating.