Sorry for the delay in reply....  Been out of town. 

I did end up swapping PSUs and same thing.  I'm beginning to believe it's a control board or cable issue.  It's at the point now after a few minutes or a few hours  the ethernet port lights start going dim, then the lights go out all together.  Once that happens the fans rev up to full RPMs and the unit drops off the network.  I can totally kill the power and the unit and start the cycle all over again but it is a continuing cycle.  Not seeing any errors in the sys log that sticks out.