Did you ever get this figured out?
My S2 was working great for a week, had to power down to move some cables. Then when I turned it on, all I get is fans going and the blue screen. No connection to my network or anything.
Im having the exact same problem, Red lights on the BB Board and IO. LCD screen is blank. Tried to get Bitmain involved but they seem to disappear when it comes time for a resolution.
Tried SD recover but it made no difference.
I will post something if I find a resolution.