Television and Home Theater

Hi, my Hitachi 57in rear projection TV has its convergance out of line especially at the top and bottom of the screen.  It is also a little blurry, and jitters every few seconds.  I had a repair man come out and he replaced the convergance, but it did not change anything.  Picture still the same.  What else could be causing this problem.  It seems that after an hour or so, the guns are a little better.

Thanks

Convergence is way off, and it looks very fish eyed. As usual 3D Glasses may help. From the service menu the convergence tweaks will not adjust at all any gun. My thought is that I need to first replace the IC's. Is this correct? My question is what is the part # I need for this RPTV. Any assistance and a manual is greatly appreciated. Thank you in advance.

A friend of mine gave me an old Mitsubishi vs-60801 diamond series rear projection tv and I have noticed that the picture has vertical fuzzy lines. The lines are not always visible and if I adjust the brightness and contrast they get better but don't ever go away. They are real noticable when watching a football game certain parts of the grass looks like it has fuzzy lines running through it. The thing that confuses me is its not the whole field just parts of it that get the fuzzy lines.