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Discussion Starter · #1 ·
My Centronics ZAT 502 HD at time puts a large block box on the screen (covers maybe 80% of the screen) with the text "8A" (or variations) in it, in a normal sized font at the top of the black box. The variations that I see are like 8A* or "8A*8A*8A.

If I change channels and then change back to the original channel, the text & black box is gone, but often reappears a few minutes later.

Has anyone else seen this? Can anyone tell me how to stop this?
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