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I just received my Baikal giant b last week, I manage to set it up and it worked for 3 days before it starts showing this sign
No devices running ...
Why should anyone but the manufacturer provide technical support for their product?
Baikal, Bitmain, etc., get away with this crap because: A) they aren't located in countries where the rule of law prevails; B) people keep buying their shitty products even though it is well known their warranties aren't worth shit and neither is their technical support.
Maybe Baikal will send you a coupon so you can buy 4 more miners for the price of 1. That seems to be their preferred method of dealing with warranty issues.