I have a Sammy HLP5063W that is about 4-5 years old.  It is definitely within the timeframe for the lamp to go.  My wife was watching the TV the other day and it stopped working.  She described it as “all of a sudden there was this loud vibrational noise and the screen went all striated and then all black”.  She turned off the power on the TV, unplugged it for a minute, plugged it in again and the noise came back even though the power was off.  I took a look at it when i got home, but there doesn’t seem to be anything happening with it.  Any ideas on what the problem could be?  Is it a blown lamp, or maybe the color wheel?