Re: JVC service or questions

Hello, I do not know the model number of my TV. It is a 36 inch JVC regular tv. Somehow the channels appear with a large black box covering the screen. This just started happening recently. I'm not sure if somehow the channels are locked for some sort of security reason. I do not have any of the original paperwork as I have acquired the tv from my sister when she needed to make a sudden relocation. Can you help me?

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