My projector only shows black and white

My projector is only showing in black and white. Ive tested the cable from my tv to my xbox and it shows in color. But when i plug my xbox up to it, it only shows black and white. I tried pressjng the color button on the size that doesnt help. I took the light bulb out and made sure it illuminated like it was suppose to and it did. I read online that other projectors have a fillament ring or a color ring infront of their light bulbs but the service manual doesnt show how to replace it, or if it is suppose to have one because mine currently doesnt have one.

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Which type of cable are you using? HDMI? VGA? Which one?