sony bigscreen projection tv

hello, I have a sony bigscreen projection tv model kp-51ws510 with huge problems with "convergance" problems I think. When you look at the tv in the left hand top corner its extremly bad. Also any words going across the bottom you can read but it is really blurry. Almost looks like it should be in 3d. I have no expience with TVs but really dont want to buy a new one. It is only 3yrs old.  Please help