Works only when connected to laptop

Sussexdiver Registered Users Posts: 2
New Seeker
OK this is random .my sat nav stoped working in the car .came up with the computer and red cross etc.
did the restore process .all looked good .as soon as i put it into the car it loads up then does random things turns the sound off maps move all over the place , powers off reboots etc .
any ideas please ?
it works fully ok when connected to laptop