I bought a 40 inch Samsung LN40B360 in December. The TV is great but every once in a while the screen and sound will go blank for about 1-2 seconds and then come back as normal. This has only happened when I have it on the cable input and has not yet happened when I had the PS3 input on. Does anyone know if this is likely an issue with the TV or with the connection. Is there anything I can check to properly diagnose the problem and what is the best course of action to get it fixed.