My picture is cut off about 1 cm on the left side of the screen. It seems like a bar of black pixels lays over the Image. The other sides are perfectly fine. This happens with all kinds of input sources. I tried to crop the picture, move it, change aspect ratios and I fiddled with the over- underscan feature on my Pc as well. As seen in the picture, the green square does not show on the left side.
Samsung TV's have a diagnostic menu .
Goto MENU > SUPPORT > SELF DIAGNOSIS > PICTURE TEST.
If you still see the bar then the TV might be faulty.
Do a software update. MENU > SUPPORT > SOFTWARE UPDATE
Also try a picture reset. MENU > PICTURE > RESET PICTURE