Samsung Blown Capacitors
i have an older samsung that needed a power supply board replaced because of a blown capacitor.
the tech who replaced the board told me that every manufacturer is having this problem because they all utilized the same source of capacitors for their TV's. to make the situation bleaker (unless you want to laugh), the techs typically replace the entire power supply board with new boards that use the same crummy capacitors.
the moral of the story is to try and find a tech that can remove the offending capacitor(s) from the power supply board and replace them with higher quality stuff.
the tech who recently replaced the motherboard on my new 8500 series confirmed this recommendation.