O.k then that confirms it.
The power supply circuit alone is defective.
From what you told me about the capacitors for example, there is no point at this time to try to repair that board.
The separate part that produce the VS voltage is defective .
Which means the best way to go about it is to replace that board.
I have here an address(below) where you can buy it;
That store is probably the best i could recommend.
Also since they had some website problems recently they are offering a 15% discount, you will see it on that web page, if you`re going to order from them make sure to take advantage of it.
If you decide to do your own shopping then you can use this part number : BN96-01801A
Finally, after the test that you/we made, i am confident that replacing that board will restore your tv to its normal operation.
Hope this help and let me know if you have any questions.