There are several reported computer video cards that are having this issue. The problem lies in the fact that the teleivion detects an incoming signal on one of the pins that is assigned to it. Some manufacturers have provided a patch for the video card on the manufacturer's website that corrects the "Sending signal" pin to the correct pin, which allows the television to detect the signal.
The best thing is to go to the manufacturer's website to see if that patch is available for your specific computer.
Also, there is usually a send-VGA button (Function+F8 on some computers, it may vary). Try to toggle that so that it sends the signal, and then turn the television on, and to the PC input.
Keep me posted.
Hi all, I have problem connecting my laptop to the Samsung LN46A750.
I use 6' male-male SVGA cable to connect my laptop to my Samsung LN46A750. It works perfectly. When I press the source button, PC source is available. The problem appears after I bought 15' male-male SVGA cable. It works perfectly on day one, but not today. When I connect that cable and I pressed source button on the remote, PC is greyout (unavailable). When I change the cable back to the 6' one, PC is available. I think my 15' cable is broken so I hook it up to my pc and my 20" monitor. Voila it works. I am realy confused now. Please help.