ScorpiousCRO

Anyone?

I have Acer P1500 and recently after a period of time (10 min of operation) image is degrading. It looks like picture is loosing a colour depth. Lamp has more then 4000 working hours (majority on ECO mode). Do I need new lamp or colour wheel or something else? On one picture you can see colour borders are more sharper without fine gradient as it should be. One picture is taken just right after turning it on and another picture after 10 minutes.