Need Help With Mitsubishi VS-50609!

[2DualsNotEnough]

Well,being an idiot,I bought one of those little handheld video games you plug into the input jacks in the front of the tv.Everything was working fine while I was playing it.Then when I unplugged it,and tried to use my tv,the convergence went caplooie.The colors are all now off-center,like really bad 3-D.I tried adjusting the convergence for blue and then red,and when I went back,it looked the same.THEN I tried the advanced convergence,and when I went back,it still looked the same.
This is a Mitsubishi big screen(the old pre-HD big box from 2003 or so)VS-50609.
Did I just screw the pooch on this one?And if so,would having it fixed be cost effective,or should I start looking for a new Flat screen?
Any and all help for a tv Noob would be greatly appreciated.
Jimmy