Failure - when starting up , it boots up and says waiting for link

Prior - machine was running was shut down . Next time we fired it back up. We got this alarm .

Tried - replaced power supply, inspected cards to see if I can see any visible shorts or burns.

Still in the same scanerio

On the card that has the reset key on it. It says
Vld power - on
Pgm run - off
Io fail - off
Out dis - on
Scan fail - on

Any suggestions on what I should try next?!