A method of manufacturing a display module of a display apparatus, includes: forming a sacrificial layer on a base substrate; forming a color filter on the sacrificial layer; forming a color layer by positioning quantum dots on the color filter; adhering to the color layer a light source substrate on which an inorganic light-emitting device is positioned so that the inorganic light-emitting device faces the color layer; and separating the base substrate from the color layer by irradiating the sacrificial layer with laser light.