Thank you. Unfortunately, even though I now know where the sensor is located -- the XB1 console does not work with the Pronto TSU 9400 URC. Pronto Support offers no solution. They just say that XB1 won't work with the XB1 console. Just like that. I now am the proud owner of an expensive, high-end 'universal' remote control that does not work universally with one of today's most popular electronic devices.