I've had my virus ti polar for about 4 years and has worked fine. Recently I upgraded my computer operating system to Leopard (Power Mac G5 Quad) and I get no audio or midi. I don't know if updating the software had anything to do with it - I only use the Virus as a midi keyboard and dont use the usb.
I've reset the keyboard (Arp edit) but nothing alters - I put headphones in the headphone socket and play the keyboard but there is no audio, when I change a preset all the lights flicker and change but still no audio. When I use Logic Studio and play an old arrangement I get a midi out signal (though no audio) and no midi in. A friend told me to check the Local on/off on the keyboard menu but I can't access it! In the manual Midi has 4 pages in Edit config, one of them being keyboard - on my menu, midi only has 3 pages and it should be 4 as I have a keyboard.
Support not much help to be honest.