Yes i know, i mined the coins with S1's to buy the S2 on 16-03 for the second batch.
The S1's where great but this 

I hope it's something i can solder back, that won't be any problem for me.
Even if it's a bga or something like that.

On the controller board are 5 led's, only one of them is green.
it's the led with R41D5 marking next to it.
Any thoughts?