I have a gimpy R4 with 1 un-responsive board. Not sure if I ever swapped the controller ports to see if it is blown controller I/O or really a dead card. Will have to try that first.
If the 'dead' board shows up, well I just so happen to have a spare s9 control board from one relegated to being for spares. Some time I really should send the 3 dead hash boards (from different miners) off to MyRig in Colorado for repair/replacement...
Never heard of this 'MyRig in Colorado for repair/replacement'.
Do you know if they also repair controller cards?
Is this https://bitmainwarranty.com/ the company you are referring to?
Thanks
Yes. BitmainWarranty.
I guess they never went 100% through with changing their brand name to the "MyRig".