0 asic there might be a connection issue on this hashboard would you mind to try run all hashboard one by one?
Another thing that can cause this issue is a bad PSU, sometimes the PSU just can't handle 3 hash boards, an easy to troubleshoot both the wiring and the PSU in the same step would be to disconnect 1 working boards wires (PSU + data ribbon cables) and attaching them to the bad board.
that is correct.
but in this case find 0 asic. most probably first hashboard failure.