We just had 2 X convergence amplifiers STK392-110 replaced ( 3rd time since we bought the TV). but although the convergence is bang on with the regular picture, when we change it to a high Definition station the convergence is off. We have a sort of blue ribbon effect at the top & bottom of the HD picture. The service people did the convergence using non-HD statons & didn't realize it was a problem & neither did I until they left. I can't get the colours to line up right while in the HD mode, so wonder if there is another problem that they didn't address?