A display apparatus and a method for controlling the function of a display apparatus are disclosed. The display apparatus comprises a first memory, a second memory, a color module, and a switch. The first memory stores the first setting data. The second memory stores the second setting data. The color module is installed with one of the first color unit and the second color unit alternatively. The switch chooses either the first memory or the second memory according to the color unit that has been installed in the color module. The display apparatus functions in response to the setting data stored in the chosen memory.