Let Saturn send the laptop for repair. Saturn sends the laptop to the manufacturer. What happens if there's any transport damage? But it was not?

Who comes up for the damage because Saturn yes has sent the laptop to the manufacturer and the manufacturer says that my laptop is very broken, but I know that much was in order and that must have happened through the transport?

In principle, Saturn is liable for the safety of transport.
The problem is, however, the proof that the damage has been caused by the transport.