Could happen but unlikely. I remember a few going out that way with 741's and 8 series I think. I haven't heard of any in a while that went out as duds.

Sorry if I missed it.

When the controller is powered on, are you able to login and see the GUI?

I read this as you have 10 of the miners set up.

Did you have them on 2 separate Auc's 5 each? Have you gone back and tried them individually maybe starting at 1 miner and trying different auc/4pin cables?