I am unable to find any guides online, but just by looking at the tablet it looks like you have to pry the glass and/or lcd off. Similar to the way you would open an ipad. There's a very strong chance that the glass will crack while doing this.
When you remove the battery and connect to the charger does it start up or no? If no, you most likely need to replace the charging port. You can check your charge port with a multimeter. I highly doubt it's the display, because even if the display is dead then there would still be SOME sign that the phone is on. (An indicator light, vibration, noise, etc.)
You went to the iTunes website? Do you have the iTunes application installed on your computer? If your computer recognizes that there is a device then you may have to reformat it. But that will erase all the data on the iPod.