Hello & Welcome to Just Answer,
Sorry to hear of any issue you may be having with your device.
May I ask if you can CONFIRM the FULL MODEL of your device?
I only ask because I see a couple of different models you mentioned (250, 350, Nuvi 350, and###-##-####.
May I also ask if the internal battery (assuming it has one) has EVER been replaced?
I see it has been a few days and I just wanted to follow up to see if you have any more questions concerning this issue or if the issue was resolved.
I look forward to any further questions or results that you may have.
Thanks, ***** *****--. .-(im)