Thanks for answer. In deed it is damaged. I have tried changing the data cables of each hash board and the #1 is totally missing. So I'll send it for repair. It is pretty new but I asume that it was my responsibility. Basically I left another person "taking care of the miners" also the ventilation duct it had a curve (about 45 degrees) and I've learnt a big lesson it should be straight :S

Thanks man!