Mini Composite RCA to HDMI AV works, but not great

This product works, however, it didn't work as well as I had hoped. I wanted to use this converter to connect from my older Sony VCR combo to my Sony Home Theater, which would then transfer the signal to my new Samsung TV. When I connected the HDMI cable to the Home Theater, I got a black box in the middle of the TV screen and no one seems to know why. I then connected the VCR to Mini Composite to the HDMI connector on the TV and it worked without a black box in the middle of the screen. The picture is not real great, but you can watch a movie that is on VHS. I don't watch them often, but I hated throwing my collection away.

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