So i recently go my Lexus Gs 350 2007 model, I got it in December, and I never got the chance to check my dashboard monitor where the AC and other functions are shown. I currently am unable to use the "Navigation", "Menu", and when I go to "Info" and try to check "Maintenance" It just shows up as "A Program cannot be read, Please Consult a Dealer." for all three. I tried to look online everywhere and didn't seem to find anything relating to it, Please help me, this problem has been here since I bought the car.

 

With your car turned off, open the glove box and on the right corner theres a slot for your dvd navigation map

With foot off the brake press the engine start one time and on the navigation screen keep pressing the top right corner of the screen theres an invisible dvd eject button there. If you see a dvd slide out of the gove box player pull it out. If nothing comes out you maybe missing a navigation dvd, buy one off ebay or maybe if possible burn a dvd online. Make sure to get the latest mapped dvd for your car so your navigation will be up to date

 

Thanks this helped me figure out what was wrong with my Nav.