Mitsubishi 65 inch rear projection diamond

Its the circut board that leads into tv from power cord , i had bought mitsubishi65819 black diamond gray 65inch for $54 ,is under the warranty the board cost $350 , labor $200 but this depends on where u live ,either way it was a steal for me ,but yea i had same problem when u turn tv on it shuts down like not even 2seconds i had tech come out and he had to take the board to get it repaired ,its not available he said but its repairable , was a sears tech so sears can repair it