iPod Nano 3rd gen. doesn't power on
I have an iPod Nano 3rd generation.
If I connect it with USB port to my pc, my iPod is recognised and if I open iTunes I can explore it, add or delete files, synchronise it and play music.
When I disconnect from pc, iPod turns off and it's impossibile to power on.
I restored it and I tried to use buttons combinations (MENU+center or Menu+Play or Center+Play, etc...) but the problem remains.
Someone can help me?
iPod nano, Windows 7