Hi there. I recently acquired a JCM 2000 TSL 100, put new valves in it but the amp still makes strange loud static noises after starting up for a few seconds and then settles down. On the Marshall forums I was advised to check the motherboard and found it to have the number JCM2-60-00 which apparently is faulty. Can I obtain a motherboard that isn't faulty or would it make more sense for Marshall to service it? Ideas of prices would be great - thanks, Malcolm