How do I get my IPod Touch to be recognized by ITunes

Question

A few weeks ago I brought my Ipod Touch in to connect to ITunes to resynch (bring it up to date). It had been some time since I had done that even though the IPod was working just fine tethered to by 2012 VW Jetta by way of in-vehicle connection. When ITunes connected the IPOd basicaally stopped working and I have not been able to get it back on line. ITunes said it was an IPod in recovery mode when I first connected it so I let it go through the motions. Now when connected to my IMac the screen lights up and the Apple logo comes on for about 30 seconds, then the screen goes black again and the whole process starts again - Screen lights up, Apple logo comes on for 30 nseconds and then it goes black and starts again. The Itunes never again sees the IPod on the left hand side of the screen.
Any clues on what is going on and how to the solve the problems would be helpful. This is an IPod that would not upgrade beyond 5.? I know I purchase it several years ago, but the exact date escapes me.

Answer 1

Try:                                               
- iOS: Not responding or does not turn on
- Also try DFU mode after try recovery mode
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
- Try another cable       
- Try on another computer                            
- If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
  Apple Retail Store - Genius Bar