Before you test different navcores, do this simple little thing if you haven't done so already:
Temporarily remove the mapsettings.cfg file from inside the map folder.
This is often the cause of many rebooting loops.
A navcore you can try is 9.051, which I am currently using with my GO 730. It is suitable for all GO x10, x20 and x30 models, which includes your GO 710. Download it from this thread:
Best NavCore for Go x10, Go x20 and Go x30
I can tell you which map you need if you let us know the coverage or country you are after.