The advice for repair with Microso.ft was spot on, turned out we had only owned it 2.5 years ( the production date on back showed we could not have owned it 3) . Luckily we had NOT registered it in UK so I registered here and it proved no problem to get all the details off web for a free repair and everything free ( except a good transit box) to send to Germany via UPS for repair.
Now waiting for return which is promised within 28 days.
Once returned I will try and get our 2 Xbox live subsricpions extended by 28 days for te time we have missed BUT that is for another day. Thanks