Hitachi 42PD7200A won't power up

[wils66]

hello sir, ma'am,
any one know the value of D319 zener diode of the main power supply board?
i did'nt use my plasma tv for more than 6months(with ac unplugged), when i gonna use it it won't power up. just hear the relay click twice and no more( with green led indicator stay lighted).
thanks,
wilson