RB2011UiAS-RM boot problems after power loss

Hello!

A few days ago I had a problem downloading my RB2011UiAS-RM. When power is applied, the router goes to the boot loop. After that, I connected to the router using a serial cable, changed the boot method to etherboot, to use netinstall in the instructions placed on the wiki. Netinstall does not see my board in the key combination of IP and connection ports on this time in the serial console I see that the bootp protocol gives an error. Help solve this problem. Screenshots in the application.