iPod Classic showing white screen and burning smell

I have a iPod classic 2006 Model A1136 80GB and I replaced the battery in this iPod a year ago and the old battery has been expanded for 10 years, and the new battery in the iPod was fine and now when I plug in the iPod is flickering with a white screen and has a burning smell or smoke how can I fix it if I can't can I get all my data off of it?

[Re-Titled by Moderator]

Original Title: Ipod SERIOUD ISSUE please read