Help please , I have an IPOD TOUCH and I am unable to sync to my itunes on my comp when I connect via the lead it does not show up at all it has been fine up until today . Start by reinstalling iTunes (or update to the latest version)also it could be a problem with the cable Reinstall iTunes or replace the cable. Check whether your comp is affected by virus.It may be that your ipod touch is password locked and not allowing the computer to gain access to it, or the cord may have become disfunctional or the usb port is BAD (unlikly though). Try and after you plug your ipod touch in, unlock the ipod by entering the password. If this does not help then reinstall itunes and make sure that it is up to date. Also you can check out the two links below for extra help.

-http://answers.yahoo.com/question/index?qid=20080429105230AACd8Kb
-http://www.zolved.com/guruconnect/show_exchange/1201/When_I_plug_my_ipod_into_the_computer_nothing_happens___Ill

Hope this information is helpful. This happens to me more often than I like. Steps that generally solve the issue (after each step, try plugging it in):

1. Try different port. (try all of them)
2. Restart computer.
3. Restart iPod.
4. Step 1.
5. Re-install iTunes.
6. Steps 2, 3, 1 (in that order).


Those should work. Try them in the order given first. try latest version of i tune software. Also look for cable change. Hopefully you will get desired result.