Arris SB6190 and Time Capsule-no wifi - Time Warner Internet

This question is about "Arris SB6190 and Time Capsule-no wifi", with Time Warner Cable internet and apps. My Arris modem is working as I get super good connection when direct connected via ethernet. But when trying to use a Time Capsule to set up a wifi network it refuses to work. Are there settings somewhere I need to change or update? I've tried a hard reset of the capsule. I've shutdown/unplugged everything several times and still no wifi. Occasionally the MB Air gets wifi for a minute, but never the iphone nor ipad. And the microcell (ugh) also refuses to activate. I need a miracle or a genius.

This topic covered Arris SB6190 and Time Capsule-no wifi, and TWC cable internet service.