Our R710 server failed to  power up with E1000 failsafe voltage error & E122E Onboard Regulator Failed messages displayed on the front LCD panel.  

I first checked both power supplies and they seemed OK with the LED lights showing green.

I was advised to replace the mother board which I have done.

I have held the power button down for 60 seconds (with the power cables disconnected) and then tried powering up the server.

The same problem - server does not power up and the same error messages are displayed on the front LCD panel.

Any guidance would be greatly appreciated.

Thank you.