iPod Nano 2nd Gen isn't detected by any computer using any cable

Hi all,

Discovered a 2nd gen ipod nano while digging out the christmas decorations - it powers up and charges through the cable when plugged into either a power outlet or a computer, but the computer will not detect the device at all.

I've tried two different PCs, and two different cables but still nothing.

Normally, if a device is plugged in, a notification message and sound are displayed and played, but Windows see no devices in the device manager, and itunes doesn't pickup any devices either.