Having problems with your Projection Televisions ?

Tn61x81 My screen has a horizontal black arcing line across the top and bottom of he screen. The bottom is worse. It almost covers 1/2 the screen. I changed the convergence chips with no luck. I can tap on the side of the set and it works for about an hour, then it comes right back. Also, I have tried to get a service manual for this tv and cannot find one, any suggestions on how to fix this problem would be greatly appreciated.



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