Guide :GPS : Roadmate 760 GPS Receiver
Freezing with a blue or checkered screen
One day, when I turned on my car's ingnition, my GPS didn't start appropriately and went with a black-white checkered scrren. And, any of button doesn't work including the power button. (The power button only worked when turned on) I dodn't have any firmware to download to figure out that it would be a problem of hardware or software. Everytime I turned on its power, same thing happened.