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I tried to hook up the cable line from the wall and then when I go to scan channels no channels pops up yet it says scanning complete scan what can I do

Be sure your setup on the scan is set correctly: If it is set to “Antenna” instead of “Cable”, the scan will not read correctly. (Some sets my have “On Air” instead of “Antenna” but you have to make the switch for the scan to work properly). Still not working? Try plugging in an antenna lead, or even a stripped-back the insulation piece of coax and scan under the “antenna” setting if in an urban area. If the tv picks up some signals, perhaps your cable line is dead?