The convergence appears to be off on my big screen, there appears to be a blue halo around white lights or letters, and the red and green look like they are in 3-d. I tried to manually adjust the convergence in the menu, but nothing happens. What else can I do to fix this problem?Most places want 400-600 dollars to fix this, and I don't have that kind of money.

Televison & Video - Apex Digital - GB5108 51" Rear Projection EDTV-Ready Television