Have been a happy Rev A 64GB SSD owner until yesterday when my Air told me to shut it off, by holding down the power button for several seconds. I let it cool down for 30 min, but it wouldnt turn on. When I tried this morning, it still would not turn on. I get the light infront, but the screen doesnt react in any way and no sound except some hard drive sound if i let it run for over an hour. Please, any ideas`?