SM2.0 "Device not ready"

Hello all,

After a firmware update my Snapmaker does not start anymore. I get the warning message “Device not ready”. A Luban connection via Serial or WiFi is also not possible. A WiFi connection comes up for 1 second and then is immediately disconnected.

When I turn on the SM, the boot logo appears first. Then the message “Machine not responding” appears.

Is there any way to upload the latest FW via a boot stick or something similar?

VG Rötty