No expert here.
Couple of questions:
if you're indeed able to access the "Virus Control" plug-in, try to send the audio through the usb connection and see if it works.
then do it with the analogue audio outs (there could be a problem with the converters, maybe).
weird thing with the screen, it's meant to be coloured blue, right? (could be damaged to)...
I figure that the circuit must be ok, so if you picked one cheap and only need to change the converters and the lcd screen, it's not that complicated and expensive tho. Can't really say much more on this matter, Good Luck with it!
