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For best video quality connect your Cable Box to the Fire TV Edition television using HDMI. For Toshiba product support please call 1 (855) 527-2411 available from 8 am to 9 pm CT everyday. David M. - Toshiba Support
Sorry, there was a problem. Please try again later.Some cable channels only have a couple 4k channels so you may have to go into setup to show HD and SD channels.
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