When the set is first turned on, it works fine for about 20-30 seconds, then
the picture goes away - all but about 1 inch of picture all around the outer
edge of the screen. The square ring of picture that is left, is dim but
|NotTaR of Television Sets : TV displays black box with normal pictur..
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(The following from: (jack haney) email@example.com))
If this is a newer set, this sounds very much like a "closed
caption" box for a captioning system not being used in your area.
Newer Mitsubishis do much the same thing. If the wrong caption type
is selected inadvertantly, all you'll see is a large black box
on screen taking up about all but an inch each way.Try turning off
all closed caption. The first time I saw this I looked like a damn
fool in front of a customer, took me 30 minutes to figure it out.