Is this with just the cable/sat box, or does this symptom happen on all inputs?
I have a LN-T4661FX and the other day I turned it on after about half a second the tv made a funny buzz noise and then the picture went completely black, but the sound remained on and perfectly fine. I did some research and found many others with this same problem. So i turned it off and unplugged it for a day came back it worked fine then this morning same thing happened. I am way out of warranty and would like to know how to get it fixed or repaired my local repair men at two places told me a minimum of $700 dollars....if thats the case this TV that was supposed to last me a very long time lasted me less than 2 years.