Hi again, 
  
After replacing the PCB at the end of July last year it worked for a couple of shows then started loosing odd screens again.  I'm now back to having none of the fixture control screen working!  Could it be something other than the PCB as I can't see how a different board would come up with the same problem unless its the ribbon cable or power/DMX in/out board thats got the problem. 
  
Any ideas would be great.  I really dont want to have to move away from this desk as it's ideal for working with schools and on simple gigs. 
  
Cheers 
  
Nigel