I am also struggling to get my Slingbox 500 work with my Xfinity X1. Recently got a new main cablebox from Comcast. It says it is an Arris AX013ANC. That model is not listed as an option on the Slingbox Setup. I have heard that Arris is made by Motorola so I have tried about 20 different models and none worked. Does anyone know if the Arris AX013ANC supports IR? Could that be the problem? I have placed the small Slingbox IR extension right in front of the cablebox but still no go. TIA.
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