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I am not sure what previous customer or what voltages you are referring to - if you have measured va and vs and they are not correct then the power supply board is suspect...
Hello my name is***** do not rate until we are finished. I look forward to assisting and am very sorry to hear that you are having this problem. Can you send me the link to the previous customer question you are referring to? I am not able to see what you read. Samsung has had a couple boards recalled due to capacitors burning out. If you can still see it, can you give me the part number off of the board itself?
That sounds like a high voltage cap like this one for example:
When these blow it is indeed normally from the power supply board due to a surge.
Check the under side of the board, sometimes you can get away with just soldering on a new cap.
If the underside looks scorched as well you would want to replace the entire board.
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What didn't work? You asked if a bad power supply board could cause the cap to blow which it can. If the under side is ok as I mentioned you would want to solder on a new cap.