iPod sent back "no problem found" - is it going to work?

[mattkime]

A week ago my ipod had all the signs of a dying hard drive - occasionally wouldn't work very quickly became never working. I'd hear clicking when I'd attempt to turn it on. Exact same response when I'd try to plug it into my mac. Couldn't even reformat.

Do you think Apple got it right? If so, what else would explain that set of symptoms?