LG OLED55B6V TV Stnby light only

[Davy]

The only things that is working is the standby light, the power supply appears to be OK. I downloaded the latest software and still no joy.

I noted around the aerial socket area there is what looks like a dc-dc inverter.... there's only mV measured arounda largish diode, then there's large a ceramic capacitor marked F6E measured 27nF, one side soldered to the tuners casing... on the board it's marked VA6781???? There's only mV showing on my meter around here and the diode, I'm thinking this capacitor is decoupling for of the inverter.

Anyone come across before on the LJ6 chassis? Thanks,

Dave