While in mid-program our Samsung tv went black, and continued to make popping noises. I have taken off the back and it appears the popping is emanating from the power supply board.
This tv is only 3 years old.
If it is still under warranty, I'd start an RMA or warranty replacement with whomever holds the extended warranty plan if you have one. If not, then you are probably looking at replacing the main power board, but there are other things it could be as well and none of them are things we could easily teach or instruct on how to test or what to look for on here other than if you are very handy you might take the back off the unit and look for any leaking or bulging capacitors on the main power board.