Hello friend, I'm a very serious problem.

I went to upgrade the IPOD mini and pro inattention not aterei the key hold, it damaged the IPOD, I believe that any regulator, and this happened to two devices, do not want to lose these devices, I know it can be something simple, but I do not have the knowledge to locate the fault, but I know that surely someone must have already had the same problem. I found on the Internet a solution, so I write kindly to know if you have a solution.

The unit turns, not boot disk when plugged into the USB recognizes the disc and restart.

Very grateful if you can help me.