Old RB850Gx2 worked fine with 7.11.2.
I updated it to 7.12 with Winbox, but it couldn’t complete reboot.
I tried Netinstall with 7.12.1: it completed successfully, but it didn’t recover it (it spontaneously reboot after some seconds).
The router has console over serial port … you can connect and see what it says when rebooting.
Did you upgrade routerboot (equal to BIOS/UEFI on PCs) recently? Older routerboots can have hard time to boot recent ROS versions. And netinstall doesn’t upgrade routerboot, you have to do it from running ROS.
Thank you. Then I’ll get a serial cable and see what it writes when it starts up. Is there no other way to update the routerboot?
I don’t have any device with proper serial port so I don’t know what exactly is possible. If I’m not much mistaken it is possible to upgrade routerboot via serial console, but a) you have to have appropriate fwf file ready (possible to get but not trivial) and b) use terminal client on your PC which supports correct file transfer protocol (supported by console itself) which is nowdays harder than point a).