Hello!
I have a Samsung LT23A350, model LT23A350A250NDY/ZA. The RF and HDMI inputs are functioning properly, but I'm unable to get a signal on the composite line input. I've tested it with four different working sources, including video cameras, a DVD player, and a VCR, but the TV won't display any picture from the composite input. I also tried the three component Y, PB, PR inputs, but still no picture—just a "No Signal" message.

I checked Samsung's website for any firmware updates but didn't find anything. This TV uses a pigtail adapter with five RCA plugs, and...