Sony Playstation 3 (PS3) Console "samsung plasma hdmi ports working" Questions

Samsung PNA650 plasma). Afew month ago, the PS3 played thru the receiver no problem, but now the receiver doesn't recognize the PS3. If I hook the PS3 directly into the TV, it plays no problem. I have

...Plasma (via HDMI), this doesn't work either! Both PS3 consoles work perfectly on my the LCD TV. Just so you know, my TV is set to HDMI as it always has been. I am currently playing the PS3 thru the ...

...Samsung Plasma 42'' does not detect a signal anymore. Took it back to the shop where they tested the unit and they claim that it started up fine and played fine for 45 minutes without a problem. I ...