I also have a complete coorespondence with Bitmain tech support, Jessica L. I can post it if you guys are interested. All they have done is given me a generic trouble shooting list and not answered any of my specific questions.
Thanks for your consultation!
could you please try to exclude the issues by the below instructions
1.check the wires for the hashboard--pull them and re-plug them again, and also you can try to change the new wires
2.upgrade to the latest firmware
3. change the PSU to try it and reset the miner to the factory settings
4.flash the SD card program to recover the control board
the SD card program have be sent to you aby another email box, (also in your spam box)
instructions:
1 unzip the file we send to you
2After decompressing the card file, put all the below files into the card,
3 insert it into the card slot of the control board,
4 and power on the control board
5 after the red and green lights blinks 3 or more times you can remove the SD card , it is ok
Please let us know if you have additional questions or concerns.
Jacob