I would contact Jean at Amiga Center in France. He does a great job in repairs! He has repaired a A4000 and two A600 motherboards for me and the time it took to send them off and have them back on my doorstep was 3 weeks! From what I remember he charges around $100 to fix the A4000 and around $50 for the A600s. This is a good deal as a used A4000 MB or A600 costs $150+ (USA)