My apologies for the delay in getting back to you. Ive just seen your replies & started my shift for today.
Lets try this, remove any cd's in the drive, remove any external hard drives and then go back into the recovery, utilities screen.
Now, click the samsung SSD or Macintosh HD and we need to click repair disk. Will it let you repair disk on either? If not, then run this repair step next
Start in single user mode by holding down command S .. All you will see is a white or black terminal screen where we can type commands.
type this in after where it says #root
And then hit enter.. If it gives you any errors, run it again.. And again.. and again, till it doesnt come back with any errors.
Then, type reboot.. Will the mac start now?
If not, with all cds and external drives removed.. Press command R when you start and then choose reinstall mac osx..
That should fix the issue if nothing else did.
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Senior Technician and Network Switching Systems Operator / Maintainer.