Just had my Mac book to the apple tech cause it would not charge or turn on. Payed for replacement hard drive. It worked great for one day now won't charge, won't turn on , no noise, no fan, no power. As I have read above people had the same problem when replacing hard drive themselves as the apple tech that did mine. Having to head back to. The store again for an analysis and hopeful a quick fix. If I can I will post what they did to repaire it this time. I know it is not the charger cause I tried three other charger using different out lets incase that was he proble absolutely no power. Here go fingers crossed