DP50710-00 / 01DP50740-00 / 02 / 03DP50741-01with panel # MD-50H13NBESuggestionsThe Pwr Bd. is seldom bad.If the Pwr LED is turning OFF in 4-5 sec., theseare the most common failures on the SC & SSBds., If any are shorted, please replace theboard.SCD451D481Q661Q401Q402Q421Q422SSQ001Q002Q021Q022