WS-55413 won't turn on

Larry,

I did some searching and can not find what I'm looking for.  I have a Mitsubishi WS-55413 that all of a sudden turned off and won't turn back on.  When I press the power button the tv clicks like it wants to turn on and the green light comes on then the tv shuts off and the green light turns off.  I don't get the blinking lights.  I have the service manual with the schematics but not knowing anything about tv repair I'm not sure where to look.  Will you help?

Thanks,

howzz