Nope Sadly this did not fix the issue. Looks like I'll be making a call to Access.

Thanks man! Hopefully it is this issue, the battery has never been changed so it's fairly likely and the synth works perfectly apart from this issue.

Hello, My Virus B has just gone completely weird and horrible. All the sounds just come out as horrible farty digital noise and it doesn't seem to be processing MIDI data properly e.g. notes play intermittently. I've tried resetting it holding down both LFO shape buttons and initializing edit buffer...