Try website like Remotes.com to buy the tv original remote to used.U will used the tv original remote to turn to channel 3 with ease.After u have the tv original remote push the menu button go into Closed Captioning functions turn off like TEXT 1,2,3...The big black box will not appear on the screen again.Tv used it manually control buttons up and down channels trying to get to channel 3.U will never get it to tv channel 3 because tv channel 3 was not save on it memory list of on the tv turn manually channels buttons programming memory.Tv have a manual button said MEMU button on it tv front bazel frame?Yes.Might could used the Menu button on the tv frame to get in to turn off TEXT 1,2,3...to stop the big black box to show up on the tv screen again.
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