If you had it running in another hemisphere, then it probably thinks it’s still there. The quickest way is to re-inaitialize it.. Usually asks wheat hemisphere you’re in...
Otherwise, most will figure it out in half-hour or so if you leave the receiver in view of the sky.
Te-initialize could be a menu item, or remove/replace the battery. Don’t know tomtom.
I hadn’t thought of that. Take the battery out and replace it. Will give it a try. Thanks for the tip.