Replaced Battery Won't unlock

I replaced the battery with a new one from iFixit. IPod won't turn on unless connected to Macbook Pro and in iTunes where I can see and listen to all music and playlists on the computer, but not on the device.

I am unable to use any functions on the device as the lock indictor remains on regardless of the position of the lock button.

So I can't restart or scroll through the menu or access music on the device.

Possibly the new battery is a dud or something is wrong with the lock/unlock function.

Would love to revive this but don't want to invest too much more cash or time.

Would like to have all the music off the device before trying a restore.

iTunes doesnt appear to provide that as an option. Any 3rd party program work well to grab the tunes an/or playlists?