A video projector comprising: a plurality of light sources, wherein the video projector is configured to project and display an image using light emitted from at least one of the light sources so that each light source is replaceable while other light sources are lit; and a light source replacement detection unit that is configured to detect replacement of one or more of the light sources, the video projector being characterized by further comprising: a memory unit that is configured to store information related to combined lighting states of the light sources, wherein the information represents the combination of the light sources which are lit; and a control unit that is configured to set, based on the information stored in the memory unit, a first lighting state of the plurality of light sources, wherein the control unit is configured such that, when the control unit determines that one of the light sources which are to be lit is unlit, the control unit sets a second lighting state of the plurality of light sources in which power is supplied only to the remaining light sources of the first lighting state and automatically changes the combined lighting state of the light sources back to the first lighting state after the light source replacement detection unit detects the replacement of the unlit light source. a plurality of light sources, wherein the video projector is configured to project and display an image using light emitted from at least one of the light sources so that each light source is replaceable while other light sources are lit; and a light source replacement detection unit that is configured to detect replacement of one or more of the light sources, the video projector being characterized by further comprising: a memory unit that is configured to store information related to combined lighting states of the light sources, wherein the information represents the combination of the light sources which are lit; and a control unit that is configured to set, based on the information stored in the memory unit, a first lighting state of the plurality of light sources, wherein the control unit is configured such that, when the control unit determines that one of the light sources which are to be lit is unlit, the control unit sets a second lighting state of the plurality of light sources in which power is supplied only to the remaining light sources of the first lighting state and automatically changes the combined lighting state of the light sources back to the first lighting state after the light source replacement detection unit detects the replacement of the unlit light source. a memory unit that is configured to store information related to combined lighting states of the light sources, wherein the information represents the combination of the light sources which are lit; and a control unit that is configured to set, based on the information stored in the memory unit, a first lighting state of the plurality of light sources, wherein the control unit is configured such that, when the control unit determines that one of the light sources which are to be lit is unlit, the control unit sets a second lighting state of the plurality of light sources in which power is supplied only to the remaining light sources of the first lighting state and automatically changes the combined lighting state of the light sources back to the first lighting state after the light source replacement detection unit detects the replacement of the unlit light source.