I have a 24" computer monitor that has a physical "pop" to it, it's so loud you'd swear the plastic was breaking.
I've always attributed it to the display warming up from the backlights and some of the plastic backing flexing due to the temp changes.
I will say though that I regularly watch my 46" 8500 in a room that's 63-67F and I don't hear any popping at all. Also, I'd have to say that since this set uses LEDs it shouldn't experience the same temp fluctuations as a CFL set, but I guess that doesn't mean there would be none.
I think your first plan of action is to locate the source of the popping, is it physical? electrical? and go from there