I just replaced the convergence chips in my JVC AV56WP74 TV and am running into a problem. I replaced the stock chips with a pair of Sanyo STK394-160 chips and am pretty confident in my solder connections. But when I powered up the TV the convergence wasn't as bad as before, but still out of wack. Also the top and bottom of the screen are pulling in towards the middle of the screen leaving a black area at centers of both the top and bottom. Any thoughts? Is it possible that I've got to get into the service mode of this set to solve this?