My friends friend, had an ipod classic 5th gen, and her wife said it had a hardware problem, im not to aware of it, but i got it yesterday, i tried it, it gave me an error, its a white screen that says, restore ipod, use itunes to restore ipod, then the same message in 4 other languages, after that it goes to a screen that say " do not disconnect" and rarely it will swith to "ok to disconnect" then back to "do not disconnect". i read, in another apple support section, that accessing disk mode can fix reseting problems, i realized that its been going to disk mod on its own, so i followed your steps and accidently did auto test, and it passed all tests, after trying again i hit menu and did the tests, these are my results:
retracts:26
reallocs:50
pending sectors:10
poweron hours:90
start/stops:2757
so by the power on hours, it seems fairley new/very unused, so i doubt that the hdd (hard disk drive) is broken, but its very possible, i can hear the little reader going back and forth, so if this is bad tell me, and if it isnt give me help, if i fix it ill post, but until then...
Thx ;D
P.S. i posted this after what i said, so i havnt gone further than what ive explained.
P.P.S. sorry if this is long.... lol