my graphic card is Asus ENGT430. it has HDMI, DVI , and VGA output.
on my old computer, dell inspiron 531, I have 2 monitors ( one using dvi, another using VGA), HDMI connects to my 60'' LCD TV. If I open up NVIDIA control panel, all three monitors are listed there. I can pick which two I want to use (this graphic card only supports 2 monitors).
Now I got a new rig. its sandy bridge 2500k. I did the same thing, using same graphic card. but I only see 2 monitors in the NVIDIA control panel. 60'' LCD tv cannot be detected. I have latest driver installed. what else should I check?
new rig specs.
CPU Intel 2500k
Motherboard And BIOS Version asus p8p67 pro
Memory G.SKILL Ripjaws Series Desktop Ram: Ripjaws X 8GB (2x4GB) SDRAM DDR3 1600 (PC3 12800)
Power Supply PSU XFX|P1-650X-CAG9 650W RT
Graphics Asus Engt430
Case And Cooling Cooler Master RR-B10-212P-G1 Hyper 212 Plus
O/S And Misc Stuff windows 7 64 bit
I had problem like that with one of my computers connected to LCD TV, it would not detect it unless i have turned on TV switch it to HDMI mode, and then powered on computer, but im guessing you already tried that