Opening up the back of this TV, it is a relatively newer design with a combined power supply/inverter board. There were no big capacitors which are the usual suspects with this failure. This TV uses model BN44-00264A power supply. There are a few posts on badcaps.net about this problem with the likely suspect failed FET transistors. With the back opened, I tested the two fuses on the combined power supply/inverter board and FM802S was blown. If you replace the fuse, it will just blow again. I removed QI820 and QI821 and they tested as shorts on my ESR meter. The FETs are a little tricky to remove since they need to be unscrewed from the heatsink and the drain and source pins have small grommets in the holes. I ordered replacements on Digikey: FETs are part# FDPF7N50U_G-ND and the fuse is F2376-ND.
After replacing the two FETs and fuse, the TV powered up with no issue.