sony kd-65xd9305

[t1412]

Hi fella's, been to the customers house twice now, to try repair this tv, it's a sony kd-65xd9305 dead, it's a 240v into a external box with 24v dc coming out usb lead connects to power box and tv, there's 24v at the fuses on the led driver board, so i replaced the mainboard twice thinking it was faulty here is a picture of the led  driver board thanks

regards
shaun