Hi guys! I am Sharah, having trouble with the blinkin folder with question mark. It is a MacBook Pro 13 Inch 2010. I've read many threads and said it probably hardware problem which the most possible is the HDD. I've tried several methods such as internet recovery, PRAM etc. When I did the internet recovery the HDD was not read, so I was so sure it will be hardware problem. But surprisingly after I went to the Apple Centre service today, they diagnosed there are no problem with the hardwares. And somehow they succeeded make my laptop boot normally. Then I thought everything is now ok, I shut it down and went back home. But when I try to turn it on at home the blinking folder with question mark back again. I am so sure it's software problem. Anybody can help?