Originally Posted by jdsmoothie
Your best option is likely to just get another brand of BDP. Try connecting to each of the other two HDMI jacks as you may get a better result. Also, to minimize HDMI handshake issues, turn on the TV first, wait a few sec, then the AVR, wait a few sec, then the source device (eg. BDP). If still no joy, you also may want to consider replacing the router with another brand as well.
Thanks JDS. Just an update and clarification...
Router is disconnected. BD player is disconnected - should have mentioned that before...still white on gray.
Tried composite video cable from Monitor Out on Denon to composite in on TV. On-screen menu display is white text on black - like normal. Switched TV input back to Denon on HDMI - OSD is still white on gray. What could have happened all of a sudden to Monitor Out on HDMI to make this happen? It was fine for 18 months. Also followed "turn-on" sequence as suggested.
I also tried playing a BD - T2. It looks horrible! Something has definitely gone wrong with the HDMI Monitor Out port.
Really don't want to do a Microprocessor Reset unless I absolutely have to.