LinuxCNC with 7i95 stopped working

Since Today I have an error at startup. My machine is worked well the last two years. But today it comes to an error at startup. When I used it last time, two weeks ago everything was okay. I have not made any changes on the machine and pc has no internet.
It looks to me there is a problem with one of the Mesa cards. Report tells me “board fails HM2 registration”. I thinking this is the important message. Unfortunately, I’m not sure where I should start to search.
I have a Mesa 7i95 connected over ethernet. Over smart serial I have connected 7i83 and 7i84.
I can ping 7i95 and mesaflash readhmid recognize the board.
Someone know more about this problem?

The "fails registration" message most likely indicates that
communications were lost during card initialization.

Is it possible there is a 5V power issue?

You might try simply pinging the 7I95 card
to see if there is a intermmitent communication failure