98% Difficulty: Moderate
If the screen is frozen or malfunctioning, a simple reboot often clears minor system errors: nddn-w57 reset
If it still says "Incorrect Disc," the internal lens might be dusty. Some users have success carefully cleaning the lens with a cotton bud. 98% Difficulty: Moderate If the screen is frozen
into the slot behind the front panel. Turn on the car/radio . nddn-w57 reset