Multiple CCR1009-8g-1s-1s+ bricked

Hi all.
I have two ccr1009-8g-1s-1s+ that became bricked after a random time of use.
Contacted the company that I bought them and they opened RMA. After the check of the routers they said that there is nothing wrong with them!!!
I saw http://forum.mikrotik.com/t/problem-with-ccr1009-8g-1s-1s/82024/1 post and the symptoms are exactly the same.
I can post the S/N from the routers.
Does anyone knows what is the problem with those routers?
I replaced them with other routers but its a big loss for me.

If there is any news about this problem please advice.