That's not something considered user serviceable so get your TV tech back to correct it again.
samsungparts.com may have a service manual but as this voids the warranty and is unsupported the advice is to never use the service codes. Never. Some folk get really upset when the codes are used and the next tech tells them to replace the main board.
Bob
Samsung TV Model LN46A630M1F
I was experiencing some picture problem and did a manufacturer reset using the service code. After that, the screen seems to have shifted to the left a little bit. Now, I have just a thin slither of white light on the right edge and also white light showing through the edge of the front clear plastic bezel.
I think there must be some kind of setting in the service manual that I can tweet to get it back, but I don't know what some of the codes mean. Can someone help, please?

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