Owner reported he had it diagnosed as bad backlights. US model number may be RTRU5027. Checking the backlight connectors with an LED tester, the two wire pairs had the same voltage. After opening up the tv, all the leds tested fine. Then I noticed the burnt FET on the power supply board. Source pin was blown out. There are two on the hot side (not heatsinked) and they look mirrored but most of the components on the burnt side seem damaged. I can match the resistors but the SOT23 transistor is suspect and the diode is bad and can't read the markings on both. Power supply board is HSL55D-2S9 and a bit expensive for a used one.
LED driver IC is TI UCC25710.
LED driver IC is TI UCC25710.
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