power problem with hitachi 50ux23k?

this set a hitachi ultravision 50ux23k was connected to a cable converter box which in turn was connected to a serge protector , had a power outage due to lightning and when power came back on cable box and dvd player were working but tv wont come on both leds on pwb dont come on and both fuses check out ok . what would be the mot likely fault
short of replacing the entire board
thanks