We were able to reproduce the issue on one of the cRIOs here and believe we have fixed the issue causing the 4 blinks and the "Exception code: 0x00000300"
Please download the new image from FIRST Forge here:
http://firstforge.wpi.edu/sf/go/proj...crio_image_v28
Let me know if this resolves the issue for you.
Thanks,
-Joe