how to fix unable to dedect internal memory?

My navman 250 screen is cracked. Can u repair it?

no power to sat nav?

Navman s100 frozen at start up screen?

how can i fix my navman 685?

Cant charge navman?

How to navigate without buying maps?

The green light on the plug doesnt light up when i plug in my Navman F20?

My Navman S30 3D is locked on the first screen with the lady hanging out th?

navman screen?

How to change battery?

navman won't power on ?

navman has stopped showing maps ?