change of hdd did not work.
I went to the computer tech here at my college because by MacBook Pro turned off by itself and when I turned it back on, it gave me a blinking folder with question mark. They suggest that I should change the HDD. So I bought the HDD and have them replace it. They ran a test and it passed the test on the new one and the old one. So they don't know is. I would just like to know if you know what the problem is.