SSD not booting but working as external

[Southafricanrob]

I switched to an SSD about a year ago and been running seemlessly and fast ever since.
I cannot boot anymore and get the flashing folder/question mark logo. I managed to boot into single user mode and repair the disk but the problem came back a day later and now I cannot even enter single user/verbose or recovery mode - just the flashing folder.

What is strange is that if I take out the SSD and swop it back with the original drive then I can mount it as an external and see all files and everything works fine.

I have Verified the drive in Disk Utility and all seems fine. Is there anything I can do to get it to boot as a normal startup disk again without formatting and reinstalling osX

(Macbook 13" 2.5 core i% 8MB RAM running 10.9.3)

 

[keysofanxiety]

I switched to an SSD about a year ago and been running seemlessly and fast ever since.
I cannot boot anymore and get the flashing folder/question mark logo. I managed to boot into single user mode and repair the disk but the problem came back a day later and now I cannot even enter single user/verbose or recovery mode - just the flashing folder.

What is strange is that if I take out the SSD and swop it back with the original drive then I can mount it as an external and see all files and everything works fine.

I have Verified the drive in Disk Utility and all seems fine. Is there anything I can do to get it to boot as a normal startup disk again without formatting and reinstalling osX

(Macbook 13" 2.5 core i% 8MB RAM running 10.9.3)

13" MacBook Pro 2012?

If so, I suspect it's the HDD cable. Common issue on your model. Quick job to replace it and the parts are pretty cheap.

 

[Southafricanrob]

13" MacBook Pro 2012?

If so, I suspect it's the HDD cable. Common issue on your model. Quick job to replace it and the parts are pretty cheap.

Thanks - Yes that's the model. Seems to be running fine with the old drive in again though, would assume the cable error would give same fault on both?

Also, if I try and select the ssd (now in the external enclosure) it doesn't appear as a startup disk option