Did you contact Access through regular customer service or did you contact Access' official hardware repair center in Germany at this website:
http://www.synthesizerservice.de/index.php?lang=en
Hope this helps you out as have read time and again they get back to you rather quickly and should tell you options. YOUR situation is the exact reason I am highly picky of whom I purchase *any* gear from and have been lucky on ebay in dealing with same sellers pretty much over the last two years it took to build-up my synth-based studio since am now a USA Military Disabled Veteran at age 49 and have all time in world for getting back into music as a form of 'therapy' on many levels. When a potential buy is already broken and the seller has attempted to "fix it", you NEVER know what they did that may have made originally a "easy fix" for you. Sometimes being pragmatic in the quest of being "thrifty", can end-up at times costing you more heartaches in the end. Is your Virus B a Keyboard or rack/desktop version? By the way, a really great tip that was given to me a while back that I will pass onto you to prevent killing gear with accidentally using wrong power supply and frying any gear is: Simply use a paint pen marker or tape wrapped around each of your power supplies, and label each power supply name of instrument it goes to. On some other pro-forums I have read over and over the number one reason for probelms with otherwise very well-built gear such as our Virus is power supply polarity issues and not using power conditioners for your gear. Alternating Current is exactly that; a pulse that moves quickly back and forth at lightening speed. Power grids pretty much in ALL Industrial Nations have NOT "kept-up" with population growth. My brother works in this field. So instead of extending the power grid properly, they "step-up" that electrical pulse to compensate, which makes it VERY essential to use more than your discount store power strips that claim "surge protection". Yes, a "surge protector" does what it says it should BUT by the time the surge or spike is high enough to be where it reaches the rather high tolerances of your "consumer power strip surge protectors", it could be too late in that it has already potentially harmed our very picky instruments that sculpt sound using electricity in intricate circuit boards. I should add the obvious but not everyone reads their manuals but when not using your instruments, it's a very good practice to not simply turn-off rather, unplug even your power conditioner from the wall source because just as many things when turned off, STILL may only go into "stand-by mode" as an example both my Waldorf Microwave XT and Waldorf Q Rack synth indeed are in passive stand-by mode when it appears all is "off".
You most probably know all this already and if anything hope it helps anyone that reads this post. Even my seperate DAW custome-build tower computer that is ONLY for audio/visual editing and recording, when "turned-off" the X3 power usb ports are active AND could hear each of the two large and fast hard drives "click-on and off" from time to time, so I simply unplug that power conditioner until am wanting actively use my audio interface and DAW PC.
Good fortune to repairing your Virus B--it's a very powerful beast and can do SO MUCH more than what ANY preset collection can convey! The deepr you go the more potential you realize the beast has as I call it akin to "Alice in Wonderland's", going down the "rabbit hole" of new discoveries.
Robert