Hello,

I've been running 2 cubes powered by a Corsair CX750M for a couple months now and all was great.  Recently I started having the random resets on one of them (call it unit A), and found that it was due to the fan needing replacement.  After the fan was replaced in the unit causing problems (unit A), everything was back to happily hashing.  But then a few days later the other cube (call it unit B) stopped completely (I noticed because the fan was stopped and no lights were blinking, but "SB PWR" was lit).

I powered down the rig (both units) and replaced the fan in unit B, thinking it might be related.  After powering on the rig, the working one came back normally (unit A), but the now 'broken' one (unit B) starts the fan spinning, has "SB PWR" lit up, but nothing else happens.  No ethernet connectivity, or LEDs.  No 'click' when power is applied, like it used to have before.  The Status light never blinks red -- nothing.  I took all the blades out and everything looked fine.  The board doesn't have any visible damage.  I tried replacing the fuse, but the same thing happens.  Any ideas on this?  I held the factory reset button for a long time, but absolutely no response.  Please help!