The advice to offer depends a lot on your skill level. Have you ever worked on a Synchro Compur before? I could be more specific about what needs to be done, but I don't want to waste your time if there is, in reality, very little likelihood of you doing anything I suggest, and more to the point, I don't want to waste mine, either. First, though, you'd better turn up and follow up your enquiry. Very, very few things online tick me off more than someone who indulges the goodwill of others to assist with a problem, and then buggers off never to be heard of again. With only a solitary post to your name, the onus is definitely on you to follow up your initial post. Over to you...