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Yes you can hook up cable box and you do not need an echo device for this tv to work. The remote will be your echo device.
Sorry, there was a problem. Please try again later.I assume your cable box has a HDMI output connector which you can use to connect to the TV w/ your 4K cable. The remote is independent of the Echo. The 4K HDMI cable is necessary if you are going to receive 4K programming. Otherwise you can use a regular HDMI cable.
Sorry, there was a problem. Please try again later.Yes, you can connect a coaxial cable to the TV. Your remaining question cannot be answered at this time.
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