I have a 60" early build SXRD....currently on its 3rd OB with no green blob issues... I have noticed recently that the "brightness" is dropping off.... hard to describe... just seems darker. I acutually put it in "Vivid" mode yesterday.. Is this a sign of a bulb getting ready to go ( set is going on 2 yrs old) or somehting else...???

probubly the bulb going bad...it will slowly get darker as time goes on and then one day it will totally go out