You didn't say whether this was a projection TV or a tube TV.

If a tube TV, definitely just buy another one.

If a projection TV, then the convergence is quite fixable, but what it looks like is that the memory locations that store the convergence data have gotten erased and you'll need to look into why that happened and fix that FIRST, then fix the convergence.

The best source of information on how to fix problems like that (or at least, it was back when I had a projection TV) are the forums at www.hometheaterspot.com .