EP4CGX110DF27I7N ISSUA

• Could you please explain what is the problem with your FPGA?
  Yes, FPGA was not sending signals to control one of the peripherals of the unit (there are two ones of this type, called P0 and P1). RMA unit could not communicate with P0 because of the absence of signals on AB8 and AF5 pins. Case was concluded as electrical damage.

• is it power issue? config issue?

No, it is not power issue, since all other functions related to FPGA were performed successfully. Only mentioned signals were not working properly. Do to this, I consider config issue unlikely, but component arrived programmed, there is no programming process in production floor to validate this part. Further analysis was required by Ciena due to the unit had failed in field, that is, it passed all test train in factory before shipping and failed with final customer.

• what are the symptoms?

Only symptom is the absence of mentioned signals, at pins AB8 and AF5, that should be working and they are not.