GTX780 compatibility problem with Panasonic TV via HDMI

[dmlerner]

I had a gtx550 connected to my TV via the mini-hdmi port of the graphics card to the hdmi port of the TV. This worked great. I upgraded the card to a 780. The computer recognizes the TV and I extended the display to it, but the TV detects no input. That is, the computer thinks everything is working. I can move my mouse onto it, etc. Panasonic, EVGA, and Nvida tech support were not helpful. EVGA suggested that the card might not recognize the firmware of the TV. The card is also running 2x1080 monitors via DVI, just fine. The HDMI cable and graphics card port work; I plugged the card into a monitor via hdmi-hdmi and it works. Help!

 

[dmlerner]

Solved. The original HDMI cable apparently wasn't compatible with the TV. It was working, in that it could connect the graphics card to the monitors (which were running DVI primarily). An HDMI 1.4 cable off Amazon basics fixed it. Also worked with a displayport-->hdmi cable.