I have been given one of the above. It was flashing the folder icon and exclamation mark. I could see it in DU and erased it. That worked. I could even see it in iTunes and add music. However, when I disconnect it, I got either just the folder again or the check mark. I can reset it but I cannot use it - same reasons as above. I took it apart and reset everything. Now it "boots" with the Apple but goes no further. I can hear the disk "clicking". I'm thinking that the disk has crashed. I see the Apple so does that mean the logic board is ok? If the consensus is yes, I will replace the drive (and the battery for good measure. If the consensus is that it's a logic board failure, I need to recycle it. Thanks for any advice. David