My H8000FW has lost internal sync. There are no digital inputs–just AES outputs. The sync is set to Int 44.1 but the "ext" led is blinking and the actual sample rate is showing as moving back and forth between 44100 and 44101. It is making a ton of digital noise from the AES outputs. Again, there are no other digital inputs for sync sources. Even disconnecting the AES outs does not stop this. I've rebooted a number of times. It always goes back to same routine. Any ideas?