I'm surprised they don't have any controller boards. I do not think they are changeable from S3. If you have 2 C1's on some firmware you are able to run 4 blades on 1 controller. So if you have a second C1 this is way to go.
Have you tried reinstalling on the SD card and see if that makes the board come back to life?
This is not possible.
C1 always has four plate.
Thank you! I had the S3 in my head.
Tupsu is correct it uses all 4 spots.