Can you theme the iPod classic UI

You can try to diagnose the problem with the diagnostic mode.

To enter the diagnostic mode, press the folowing key when the apple logo appears after a reset :

iPod 1G, 2G et 3G, press the keys for 5 seconds :

• "back"
• "next"
• "select"

iPod 4G, 5G, mini et nano, press the keys for 5 seconds :

• "back"
• "select"

In the diagnotic mode, you can navigate in the menus with the back/next keys and launch a bunch of test.

Assuming that you've tried resetting while the iPod is connected to a power source, there's really not much else that can be done. The Apple Store, or an Authorized Apple Service Provider, is pretty much your only option at this point.

Also, how long has the iPod been doing this? If it was subject to extreme conditions for an extensive amount of time, or if it suffered liquid damage, it may be broken beyond repair (or repair may be cost-prohibitive, assuming it's no longer under warranty).