well otis does sell the HVIB board. We obtained one, and got car running again. so far so good no faults, but time will tell. the DOLD relays are rly1 and rly2 on the HVIB board.
the relay on the right, rly1 left n/o contact is burned on all controllers. the other controller we cleared last week had 2000 G21 faults. we are going to remove the other relay, rly2 on the hvib board which is i good shape and replace the burned rly1 on the other car. that way we will fix 2 cars with one board, as they are quite expensive. will keep you posted, hope this takes care of it,