First of all I do not know enough about tv's to sound smart so I'm not gonna try. oing way back to post number 152, you mentioned two different parts for the Pioneer Pro-118. One of them for convergence, the other for vertical deflection. What do each of these do? I realize that convergence is more or less where the colors (blue, red, green) meet on the screen to form "1 picture". What does the vertical deflection do? I have a terrible picture problem where the center top and bottom of the screen are squeezed together towards the center of the whole screen. Could replacing the chip STK4274 for vertical deflection fix this problem. That just seems to be the most logical answer. It could be a <$10 fix for a $6000 tv.