I have a Samsung LNS4051, which has 2 HDMI slots. I was using 1 slot for a PS3 and component for the cable box. I bought a 2nd hdmi and plugged the cable box into the 2nd slot. Now, the cable box works fine. The PS3 however only works if I unplug the cable box. When both cables are plugged in it does recognize the input. Have you guys ever seen something like that? Is that an issue with the tv, the cable, ps3.... I am confused....
Thank you for your help. It's much appreciated.

Sounds like an odd problem.

Would appear to be a problem with the TV.