I have a Infocus LP480 Projector. The picture is very yellow looking. ?

I have a Infocus LP480 Projector. The picture is very yellow looking. I don't know how many hours are on the lamp as I have bought this on ebay & the lamp counter has been reset. It was bought with the undersanding that there were 220 hrs. on the lamp. Will a new lamp fix the yellow looking picture or are there other problems? I don't know if I should spend more money on this or cut my losses!