Sony Bravia cannot detect HDMI signal from Uverse box - DirecTV

#1
My new Sony Bravia cannot detect HDMI signal from Uverse box. I switched HDMI cables and still no signal.
I have a PS4 and the TV detects the HDMI sigal from the PS4 at every port.
So I used the HDMI cable from my PS4 for the uverse box and it still does not detect an HDMI signal.
Is my uverse box bad?
I don't think it's the TV.
HELP!


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