Hi,
thanks for this infomation.
From this it says the HPD = No which indicates that Hot Plug Detect is not detected. When this happens the TX will actually stay in a reset condition. This normally indicates that the 5V that is sent out from the ADV7511 is not been returned by the HDMI receiver it is connected to. Can you please manually plug in and out the HDMI cable on the TX and try again. Can you check is there a reason why hpd is not been returned on pin 19 of the HDMI cable
thanks
Mike