Confirmed, seems this is a common(ish) fault with the virus b - the capacitors go bad. Symptoms are part boot/ no boot, screen flickers green, LFO leds light up but nothing else. Don't despair, replacing the capacitors fixes the problem! There's a schematic in this thread, so if you take note of the cap values you can source them and replace without the need for a service manual. There's another approach - If you're like me and have no clue how to do that, there's a guy on ebay who sells a replacement kit that's not just a fix, but actually offers super audio quality to the existing design. It's really not that hard to do - my virus was a brick in the cupboard for three years but now it's actually better than it was brand new! Not an electronics wiz, but if I can do it....
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