Not turning on after chargng, turns hot though.

Hi

I connected my Ipod 2nd Gen 8GB for charging and left it connected to the laptop for 3-4 hours. It was charging fine, but when i went to unplug it, it was hot on the back side and wouldn't turn on.

I tried resetting it but no go.

I connected via usb and tried a reset, no go.

I tried electric adapter (wall connector) then reset it but no go.

Now when i connect it to the electric adapter the back side does get hot (right behind the wheel).

Is the battery fried ?

How can i verify that ? (i can manage a little bit if electronic repair & i have a soldering iron too).

Thanks in advance for your response.