Stuck on boot after unsuccessful update

[salik]

Hello,
I have an Asustor AS6510T. After an unsuccessful upgrade from ADM 3.4.4 to ADM 3.5.6, which ended with error Ref: 6212, a problem occurred.
After rebooting the LCD shows "STARTING SYSTEM, PLEASE WAIT..." and nothing else happens. Even the network connection is not active. ASUSTOR Control Center does not find the device.
I tried:
Start without disks - no success
Start with 1 new, empty disk - no success
Is there any way to fix the boot?

[orion]

It's definitely something wrong during upgrade. It's very hard to collect logs during this stage. I think you can only send a support ticket to asustor to get helps. https://support.asustor.com/