What is the proper way to submit a support ticket to Bitmain about this device?
Yes go to their site:
https://bitmain.zendesk.com/hc/en-us/ or might use email if in China.
What kinda issue do you have?
Like i said in my review, board 1 gets dropped regularly, then get picked back up. But its 10-20% hashrate loss in that given hour if it does. I don't know if its precursor to a bigger problem or what.
this happens with mine as well..
its usually just one hash board and its down long enough to cool it off.



This happens to me in almost all my S5, and my friends too.
Which firm ware from smit are you using the one off nicehash tends to do that on some pools . no idea why i talked with smity one day for a few hours tiring to figure it out . here is a list of all his releases for NH .
http://smit1237.asuscomm.com:8080/s5/The one off Nice hash does that to me so i don't use it. i use one off the list or link i linked .
Thanks for all the reports from quoted users.
@toptek
I use Bitmain's latest firmware with Fan Control.
Also that graph is rad, i don't have it but that is exactly what happens. Long enough for it to cool down to 38c. My reported temps were under 60c so it doesn't sound like it would be the firmware having a valid reason to power it down.
It does have the 80c firmware protection thing. Which may or not work i have no ideas.