Call your local B&O dealer
hi have laptop and cable to look inside the software about the lab5.
it is possible that the software it indicates what is defective.
repair is only possible by a dealer, you cannot send it yourself, at my cost repair 900 euros by exchanging the chassis (the amplifiers) it seems that b&o has now opted for repair, so your chassis is now being tested and the parts dell replace one that is defective, this reduces the starting price to at least 500 euros.