my iPod won't open anymore
there's a sad face iPod when i charged it. what to do?
That suggests a failed hard drive that won't initialise when powered up. See iPod Displays a Red "X" Icon - Apple Support. Apple may no longer have much interest in servicing iPod classics. The line was withdrawn quite some time ago. I would normally suggest you look at Corrupt iPod Classic, however the error message suggests that the drive won't mount so you won't be able to read off the stats.
See this recent post by Kenichi Watanabe - Re: My iPod Classic 160Gb won't register in iTunes - which gives a link to a potential DIY drive replacement.
tt2