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Have you tried resetting the GPS. To do that, slide and hold the power button for 1 minute.. T hen turn the device on normally.
If it still says no data available, we may need to refresh or reinstall the software on the device. To do that, I need to know what type of computer you have such as a Windows XP, Vista, Windows 7, Windows 8, Windows 10 or a Mac.If its a Mac, please check the OSX version as follows, Click the apple sign at the top left of your screen, then click about this mac. And then where it says version, send that to me as a reply.
Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.