My mac mini from the 2011 refused to boot. Apple logo and loading image forever..

I tried `cmd+s`: Went through all the steps from the `applejack`, tried `fsck -fy`, all semmed pok,

Tried `cmd+v`: It wouldn't fully load, got the error `Disk02 I/O error` (it was the original 1TB disk with two partitions),

So I thought the HD must be done, so I bought one Samsung SSD HD 120GB Sata 3,

Same result.

Thing is that I tried with both drives to install again the mac os x vía USB (I don't have a CD drive) and in both cases I came up with the tipical 'you must reboot your computer' error scereen.

So With the new HD replacing I did same steps, `cmd+s` and `cmd+v` provided same results....

Any thoughts?