Defective Asus Sabertooth 990fx R2.0: SSD disappears while loading the OS

For Asus assistance service: this is my defective motherboard Sabertooth 990fx R2.0. As you can see, the computer is turned on, the post appears and then the SSD, which is the only device connected on the Sata ports, starts to load the OS. While doing that, an error occurs and win 10 hangs showing a blue screen. Resetting the pc, the SSD is no longer available in the bios as it shows no sata peripheral connected. Watch the very last last seconds to see the motherboard posting again with no sata device detected.