The other miner was running 3 boards but board 2 was down. The boards had volatage 1940, 1960 and 1960. Since the muddle board was down it was running with 1940 first and 1960 3rd board and was giving full hash rate. Thus my conclusion when there is only 2 boards the stock firmware does not stop for voltage difference.

So I started with

Miner 1
1920 - issues
1920- good
1960 - issues

Miner 2
1940 - good
1960- Issues
1960- good
 
I replaced the 3rd 1960 board with 1940 in 2nd. I switched to Hive to get around voltage check of stock firmware and to get a little more clue for chip level monitoring.

So I now have a more interesting puzzle.

Miner 1 -
1920 - good now. Had 0 asic in the same slot & same miner before. Hive on indicating a lot of bad domains but running it in low power mode. Should I re-solder the bad domains?
1920 - good. Was good same slot same miner.
1940 - now 0 asic but was good in machine 2 slot 1. Power supply or power chord issue in this slot?

Miner 2 -
1960 - good. had 0 asic when it was in slot 2 but good in slot 1 same machine. Hive on indicating a lot of bad domains but running it in low power mode. Should I re-solder the bad domains?
1960 - good. It was good in slot 3 as well. Same machine.
1960 - o asic. had o asic in different machine slot 3.

Now I am completely confused.