iPod Classic stuck in Accessorize Test

So, I have decided to dig out my old iPod Classic to give to my daughter. It wasn't playing any of the music on it so I decided to go into the diagnostic mode. I got to the Accessorize Test screen, which I don't have a Firewire to plug in. That being said, i know the common answer would be to hold centre and menu to force restart, well, that doesn't seem to be working for me. It doesn't do anything. I was able to do it to get into the diagnostic mode, but can't get it to work again to get out. Anyone else know what I could possibly do?

Thanks in advance!