There is a problem with the attachment. I attempted to connect to three separate televisions, but each time I got the same response: "No signal." The glowing blue LED on the set-top box indicates that it is successfully connected to the power supply. There is no possibility of HDMI being confused. There is a problem with the attachment. a refund has been issued. However, I will place a second order in the event that I do not receive a device that functions well. I will revise the rating as soon as I obtain one that is operational.