MacBook Pro 2009 blinking question mark MiFix

The folder with the blinking question mark means that your computer doesn't know where is the Mac OS x (operating system).
It can be related to different issues, these are the most comun problems that I can think of for now:
1_ Damaged or corrupted internal hard drive
2_ Damaged data cable (Sata Cable)
3_ The Mac OsX system folder can not be found or is unreadable
4_ The storage inside your mac is disconnected
If you already tried the below suggestions is most probably that the problem is related to the above 1 or 2 problems.
1.Turn on the Mac whilst holding the ALT (option key), see if your hard disk is recognized at all or if the system is trying to boot from the wrong volume/device.

2. If the above is unsuccessful, power down the system once you have attempted to boot a few times and are sure that the problem is not just a one off freak occurrence. Do not power it back on if it can be avoided.

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