I need some help

Contacted the support yet and they barely answer my questions

I have 4 1041 with separated psus, all of then was tested/used for a month before with no issues.

When they arrive a reseted to factory (1 min pressed the func button) and put my pool/user data and IP settings

They're not hashing, no one of the 4 machines (in the overview theres a message Hashboard: 0), i tested another fw, check the connections, change the pool and nothing. The worker appears on slushpool that means no network problem, but the hash is 0.

Below I put some screenshots with the problems, if someone have a tip or need more info i can provide. The support says that is a short circuit on the miner. I post some pics on imgur

https://imgur.com/a/JGZZQAP