Have a LG 42LN543V telly, LED comes up one flash and then goes out , all the voltages are up, but the 24V to the main board is only 23.4V, I've change the small 100u 50V capacitor and still reads same, not having the service manual I assume this is for the audio amp. since the LED has it's own inverter, any clue on the error code, the standby comes up then winks and goes out.
Is it the screen LEDs or the mainboard? Thanks.
Dave