Helle, here are the tests I did:

-I change the controller wire with that of a aun Hashboard functional = not work

-I plug the Hasboard into the port or a functional Hashboard was plugged in = not working

-I used another PSU power wire = not working

-I still can not install the new firmware. I click on update, the .swu file upload up to 100% but the progress upgrade remains at 0%.

I'm sorry for my bad English, I'm a French-Canadian ...

Thank you for taking the time to help me