Strange that the DC-in board and the logic board would go bad at the same time.'' Is there some history you've neglected to share (power surge, liquid spill, high humidity)?''
There are so many possible reasons ''what you're asking would be similar to expecting a Dr. or a Mechanic trying to proscribe fixes for a person's illness or an automobile problem sight unseen...''
''If this answer is acceptable '''please remember to return and mark it'''.''