What TV box is it - TiVo, V6, 360?
Is this a new TV box connecting for the first time? How are you connecting it to the Hub - wifi or ethernet cable? If wifi - test with an ethernet cable.
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John
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My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.