DISH, COMCAST, RCN, OR WHOEVER. THIS TYPE OF PROBLEM IS USUALLY THE PROVIDER'S FAULT; THOUGH I'M NOT TOO UP TO DATE ON "CLOSED CAPTIONING." HOWEVER, if the black-box is showing, does it change as the dialogue changes???
DOUBLE CHECK ALL THE LG SETTINGS, AS WELL! Just one misstep can screw up your entire set.
SOUNDS like it's a SOFTWARE FIX.
My friend just got an LG 42" HD TV. He needs CC and sets it to CC1. For the first week, no problem, but now the screen goes black after awhile, except for a border around the edges which is not affected. If he changes channels, then back to the original channel he was watching, the black area returns.
Anyone with advise on what the problem might be? Remember, it's not my TV.