I was using 2 Corsair 750M power supplies, one for each board.

Just a moment ago, the miner was powering up and then suddenly stopped. One of my power supplies is suddenly no longer is powering up, and  I have just tried a different power cord however it is still failing to spin the fan and power up.

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(Moderator's note: This post was edited by frodocooper to remove a nested quote and to trim the quote from Crypto-Universe.)