[kmartin173]

The TV is a 53FDX20B and the only problem is in the upper left corner.

 

[lcaillo]

Probably. I would try to adjust it. A failure in the amps typically makes it impossible to adjust. This might just be some corrupt data.

Read the first 10 posts here very carefully:
http://www.hometheatershack.com/for.../5600-crt-based-rptv-convergence-repairs.html