I have a nice little Shuttle SN95G5 which has worked flawlessly for several years. Over the past few weeks it has developed a strange, intermittent fault - it won't start properly. I press the power button and it seems OK for a fraction of a second, sometimes for a few seconds, but then everything just stops, as if the power had been cut off. Even if I keep my finger on the power button it still stops. I've tried a different power cord. I've tried leaving it unplugged overnight. I've tried leaving it running overnight. There is no pattern of success/failure that I can find. I'm out of ideas, can anyone help?