Ethernet connection to Mesa 7i76e disconnecting on its own after one minute

I turned everything off except the PC and it no longer disconnects on its own and it doesnt show my mesa connection. But when I turn the mesa board and the machine on it starts disconnecting again every 45 seconds. So now I think you guys have a good point and maybe this could be hardware related.

tommylight wrote:

Can you power off the machine and leave only Mesa powered?

When is disconnects, is the init light illuminated on the 7I76E?
 

I disconnected all power supplies except for the one powering the mesa board and I still get the same error every 45 seconds. 
These are the lights on the mesa board 

OK, the /INIT LED is illuminated on the 7I76E which means this is not a 7I76E power issue
but either a host or 7I76E network issue. (The /INIT LED indicates a watchdog bite)

Is this a new problems or has it always been there?

This problem has always been there, it is a new build I just completed last week and I have gotten this error from the start.