No signal from GTX 670 > HDMI > TV

[Richardson0]

Ok so I've tried everything I know for about 3 days straight. It's a problem that's kept me up very late and I have no idea what else to do.

I have a Panasonic TXP50ST60B. It has 3 HDMI ports.

My PC has an EVGA GTX 670 2GB FTW.

On one HDMI port I have my Wii U (which works) but the HDMI connection from my PC to my TV doesn't work. I get no picture or sound, or even any sign of the TV recognising the PC.

The PC does recognise the TV as 'Panasonic-TV'. Below is a screenshot of my display settings for the Panasonic TV;

Nvidia control panel for additional clarity;

The other three monitors are my DELL U2412Ms @ 1920x1200. They run at 59hz.

I have tried every HDMI port. I have tried HDMI extender cables. I have tried a DVI>HDMI converter. I have tried powering on and off by the plug. I have tried booting up in different orders (eg TV first instead of PC first). I've tried making the TV primary. I've tried shift+P. No dice.

The TV just shows a black screen and after a few minutes it auto shuts off because of no signal.

I'm literally stumped, I've searched high and low all day for days and I have no idea what else I can do.

I've run out of ideas now. I know it's the PC end and I have no idea how to fix this. Any help?

 

[popatim]

Make sure the resolution and refresh rate you are using are supported by the tv.

 

[Richardson0]

Make sure the resolution and refresh rate you are using are supported by the tv.

I have tried literally every resolution and refresh rate on the list. It won't budge.

I have tried 1080, 720, 480, and also created a custom 1080i resolution but nothing. All at various refresh rates.

 

[Richardson0]

Anyone else got any ideas?