I have a 3 year old 1490 that has worked great until two days ago. It keeps giving me a low battery message but when I hook it up to the car charger, it doesnt charge. I bought a new charger and that doesnt work either. It also keeps giving a message that says, "external power has been lost". Any other ideas? I know I can buy a new battery but am not sure that is the issue? Thanks!
