OSX doesn't boot (stays in loading screen) (I/O error )

[gsmink]

Hello all,

My MBK pro 2009 stopped booting. I was running OSX Lion, it starting to behave strange, I rebooted, but it didn't came trough the apple logo + loader.

I had a SSD with 128GB in it, which seemed to be broken. I replaced it with a new SSD, but it still doesn't work properly. I reinstalled to OSX 10.6 and upgraded to 10.7 successfuly. But there are still 2 problems:

1) The system is freezing repeatingly for about 15-30 seconds.
2) The system does not boot (it hangs at the loading screen)

A walk around the second problem is to boot up to Recovery HD and click restart from there. The system boots without any problems, but it still has freezes ever few minutes.

I booted with CMD + V and took these photo's (im not sure anymore what the right order was)

What can be wrong?

 

[bizzle]

Very common for the hard drive flex cable to go bad in the 2009 MacBook Pro in all sizes. It's possible that is your issue all together.

 

[eljanitor]

It's the cable, logic board, or controller board on the HD. Id say with 90% accuracy its not software related, its hardware related.