I have a MacBook Pro A1278 running OS X Snow Leopard which wont boot up. Once turned on it comes to a white screen and after a few minutes an image of a folder with a question mark starts flashing in the center of the screen.
I'm not familiar with Mac's but I have looked around and the flashing folder apparently means it cant find any files to boot from. I have a program called MacDrive which lets me access the hard drive via a USB HDD caddy on my machine running Windows. I can see all the files and have performed a disk check which found no errors (The MacDrive software has a disk check option). So the hard drive seems to be ok but perhaps some boot files are missing/corrupt. Would appreciate any tips on how to repair/replace these.
I have also tried holding shift to boot into Safe Mode and holding Opt+Ctrl+p+r to reset PRam. Neither seem to do anything at all it just goes to the white screen as usual.
Thanks in advance for any replies.