AirTunes not working

Hi,

I just got back from overseas and put some music on, but there is no music coming through. The speakers are working fine (when I plug them straight into the computer), so it must be the Airport. I have done a hard reset and reconfigured it, but it has made no difference. Firmware and software are up-to-date.

Could this be a hardware issue instead of config? it is the only option I can think of.