I have the exact same fault on this board.I think i have found the problem, it could be any of these two capacitors CD03/CD64 (2,200pf/2kv)that sit just above the flyback transfomer.Those are the yellow flat round type.Check for any scorching.Please be careful as there can be high voltages remaining for a very long time even after unplugging.Only attempt if you are confident otherwise leave it to a repair technician.
FIXER_UK
July 2008