RB1200 stuck after downgrade

Hi, I tried to downgrade RB1200 to version 4.5 (to test configuration for one of the clients who use this version). Device is stuck with all lights on, no reaction on serial port, MAC detection and Netinstall don’t see it regarding the port I connect it to.

Is there a way to reanimate it?

Thanks

Hi all,

Topic is closed. It was an Antivirus that haven’t allowed to Netinstall identify the device. After I disabled it I was able to install previous firmware back and device is online now.