Check your owners manual. find the function by using the on screen menu, turn this on by pressing the menu button This function is usually in the setting functions and is usually found by using the up and down arrows to find the settings function and then using the right arrow to enter the function. After entering the function you should find the factory reset function among the listed settings.use the up and down arrows to find this setting and place the cursor on it and press enter and it should reset all the functions to the factory settings for you. Hope this helps you with your problem.