Fix Fault Sony Nv-u83

How do i update Sony Sat Nav NV-U52G maps?

I have a Sony NV-U53G sat nav. A week ago on switching it on the GPS status symbol remained RED and I could not pick up any GPS signal. When I try to enter a destination I get a message ''GPS receptio ... more

I need to replace the Lithium Iron rechargeable battery and have remove the rubber feet, which reveals the case screws, these have been removed but the case is very stubborn and seems to be held somew ... more

I have a sony nv-u52g sat nav. The battery will not charge I have tried charging from the car adaptor my computer and from a mains adaptor still no joy. Can anyone help, Thanks

everytime i switch it on .. it dont recieve any signal and i have the error code 461 ??? can any1 help please??

Sony nv u53 LCD screen works but the touch sensetive on screen buttons do not respond to touch. Only two left hand (VIEW and VOICE/POS) buttons work. Any help / solutions would be most welcome.