Please try these three methods to reset your machine: https://enforum.bitmain.com/bbs/topics/3957
Then load the firmware from this page: https://shop.bitmain.com/support.htm?pid=00720161126080548570Q2tDBXAH065D
Select the file in the last row of the table.
Run the miner for 20 minutes after loading the firmware.
If the issue is not resolved please carefully read and follow these instructions to create a Repair ticket and ship the machine back to us: https://shop.bitmain.com/repairGuide