I ask for help from the community and the guys from technical support. When completing the MTCNA course, it was necessary to flash the latest firmware version v.6.46.5 of the RB962 router using Netinstall v.6.46.5. In the process of performing this procedure, some kind of failure occurred and the router was bricked.
I held the Reset button for 15-20 seconds until the SFP LED turns off, then released it so that RouterBOARD looked for Netinstall servers. But the device never appeared in Netinstall on Windows. My mistake was that I did not disable the firewall and the second network card. After that I fixed this error. I’ll clarify that both the IP address of the network card and the IP address of Net Booting Netinstall were originally set for the same subnet. The cable from the PC is connected to the Ether1 router. I repeated the reset procedure so that RouterBOARD looked for Netinstall servers, but no LEDs blinked anymore, only the PWR LED is constantly on.
I assumed something happened with the bootloader. And I used the instructions from the wiki (Manual: Reset: Loading the backup RouterBOOT loader). But holding the Reset button before connecting the power, and releasing it three seconds after turning it on, I still did not achieve any activity from the LEDs and the speaker.
After that, I took advantage of all the possible recommendations for recovery. I held the Reset button for a little more than 300 seconds before connecting the power (just in case, I used the device formatting function with the Protected Routerboot option active), although it was not active for me. In general, I tried all the possible recommendations of Wiki Mikrotik and some forums.
Whatever I do, only the PWR LED is on, no other LEDs blink or light up. There is no sound either.
I also have other Mikrotik devices (routers and switches). I repeatedly repeated the firmware procedure through Netinstall on other devices and everything went without any problems.
It turns out that there was no process of updating the firmware of the router. Please help me restore the device. The device is no longer under warranty. I’m ready to consider any methods, even related to JTAG, but with a description of actions, as I’m not very good at it yet. But be sure to figure it out!