Hey guys.
Some info i just found out.
I managed to get all 3 boards to work on one of my miners ( with some of chips getting X tho after couple of minutes of mining, total hashrate ends up at 50 TH/s instead of 60 TH/s ) by placing a miner at tilted at 45 degrees with one side being set on the wall next to it.
Also the 2nd miner works only with 1 board but only if placed on its PSU.
So if your boards are failing you can always try different angles to get them back to life. Worth a try, hopefully it will work with your gear as well.