iPod Video not connecting to any computer. Not even old ones.

iPod Video not connecting to any computer. Not even old ones.

My iPod will not connect to a computer. It will charge but I don’t here the device insert sound and it will not show up. It is not my computer because a iPod nano will work and I connected to a Windows 7 laptop and got the same result result. I tried to reinstall iTunes but that didn’t help. The 30 pin connector makes a high pitched sound when I plug it in so the connector may be bad.