I have a Hitachi 2007 model flat screen https://youtu.be/t_Cr1_p40jk won't come on

[koeppenjr]

I have a Hitachi 2007 model flat screen the blue power light just blinks and won't come on the model number is p50h401 the blue power light on it just blinks

 

[hang-the-9]

You probably need a new system board.