iPod won't turn on. How to solve this problem?

Hi guys! I just want to ask some help regarding my iPod 3rd gen 64gb if it can still be fixed. I charged my iPod and set it to high brightness. After one hour I didn't know that it wasn't plugged properly. I tried charging it again using a fireware adapter and even through computer but it didn't work still. iTunes don't recognized it either. An iPod logo will just appear for a second then suddenly will turn black. I tried pressing the home button and power button all at once and it gave me a result of an icon of a cable with iTunes logo. Whenever I open it, that's the only thing that appears.

Could it be the battery? Or the board itself?

Hope you could find time help me solve this problem. Thanks!