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You might investigate whether the ability to configure or not is related to temperature or power supply variations. This could give you a clue as to what's going on.
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I guess I wouldn't say I can't configure. The Quartus II software says everything is green, however, I have all my signals and voltages etc. going in to the FPGA and some of the signals coming out are missing. I've already tried hardware repairs. It's a consensus that the FPGA is failing. I've had multiple boards come across my desk that work with no issues using the exact same .pof file. Unless there is a date code issue. I believe they've looked into power supply requirements. I just spent the last 2 hours checking heat. I may be on to something there, again though I've had countless success. Maybe my version of Quartus? Assuming there aren't any other issues. The problem seems to present itself randomly but it will affect 20 out of 25 boards. As a technician I'm not seeing issues on the board or from our manufacturing vendor. It's got the smartest of us stumped and those engineers are smart. I reached out on here to try and learn and understand from people like you. It may help me discover a board issue. Trying to remember what little I learned in college is nearly impossible. lol I had a semester of C that we put on an old 8051 microcontroller. Great ideas thank you.
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