USB ports don't work in my AGX Xavier dev kit

I have an AGX Xavier dev kit h01 and I install L4T R32.7.1 and I finished the installation then the update window show up and i click the update. 600mb was downloaded and reboot the system then boom. any USB ports don’t work. i cannot use mouse or keyboard. otherwise hdmi and ethernet are working . i can see the screen. please help me seeed tech.

You can set the board to forced recovery mode and install L4T R32.7.1 again

Is it possible install l4t with sdk manager? Sdk manager cannot flash the agx xavier. Can i flash manually? Does it work ?