my iPod must be a 5th Generation unit. Thanks for pointing this out. I followed your step by step instructions, and see the check mark, "OK to disconnect" message. So, the battery is down, and I've plugged the device into a free-standing charging unit (not a Mac), and the "OK to disconnect" screen is still lighted up.. I don't know what comes next.
Do I need to "restore" the iPod, as the logical next step in your reply suggests? My son says he tried to restore yesterday, but got the message "Unable to restore," so he unplugged the iPod from his MAC, and the blinking Apple logo and clicking problem started immediately, and that's when I stepped in to help. Thanks for anything you might have to tell me.
It's been 20 minutes now since I plugged in the iPod into the charging base, and the screen is still fully light up, ( is this OK?) with the check mark and message...and the charging indicator top right is moving as it should. Thanks.