Sorry, I put down the wrong model number. That's a Sanyo NVM-4370.
My Sanyo NVM4070 navigation worked fine the first couple of time I used it, but now when it try to "navigate to" or show POI, it says "no information". I shows my current location fine, and will navigate to recent destinations, but won't let me enter any new information. I've tried the on-screen reset and pushing the reset button, with no change. I haven't tried contacting customer service yet because I've heard it's almost impossible to get any assistance. Anyone able to help, or know who else I could ask?