If your VC3 is one of my design (pre 2002 with my signature on the front) then I would be delighted to fix it…. The deal is I make a fixed charge of £25 for fixing any rack-mount or modular equipment that I designed plus the cost of returning it to you. However if the unit is one of the current Joemeek products then I would suggest that you use their returns procedure.
If it’s one of mine, then the post cost would be £4.50 so the total cost would be £29.50 and you can pay by paypal, then the turnaround is almost by return of post. 
email me at [email protected] if you need any more info.