TV shut down and will not turn back on

Samsung Plasma PN64D8000FFXZA started shutting down on it’s own but would power back up again after waiting a few minutes. It continued to do this more frequently until it failed to come on at all. Tried power resets without any luck. With the set plugged into the wall, the red standby light illuminates and stays on (as normal). A relay clicks when the set is switched on and the red standby light blinks five times before going out indicating that the TV should be on, but without any picture (black screen) or sound. With the back cover removed, a green LED lamp on the logic board flashes 5 seconds “on”, 2 seconds “off” repeatedly until the set is switched back off. The red standby light comes back on again once the TV is switched off (another, but more muted, relay click). With the set still plugged into the wall, switching the TV on gets another relay click but the red standby lamp stays on without any blinking and the logic board displays the same green LED flashing pattern as previous. None of the many capacitors show any sign of bulging, swelling or leaking, but one of the transformers on the power supply board does show evidence of some scorching on the board around one of the pins (see attached photo). This TV has performed very well with a great picture, and although it’s pushing 10 years, it’s incredibly clean and still looks new. Any tips, suggestions or solutions would be greatly appreciated.