actually it's not a FPGA but there are two control processors (main processor and subprocessor) the processors are very rarely the problem. i worked on these a lot (and they are identical to many DENON receivers, with the only difference being the front panel exterior). if you have a broken front panel board, it's possible the two processors can't talk to each other. there are other things however that can cause immediate shutdown, but you probably can't do the diagnostic readout on the display if the display board is broken.