I bought the projector second hand and replaced the ballast. The sharp repair center I brought it to said the color wheel was missing a part and was making a loud noise. So he found one from his friend (open box) and replaced it. The picture is fine besides the fact that there is too much green/no blue in the picture. Is this a problem directly related to the color wheel? ( I never saw the original picture the projector produced before I sent it in to get repaired) Thanks.