Mining just stopped

Rig has been running fine for months but now it is not mining.

I had a power outage this week and now the rig is only seeing two of the 4 cards and those are not mining. After the power outage the NIC (Alpha USB) did not show any activity on the light so I rebooted a couple of times and unplugged and replugged and it eventually started behaving normally.

I know that I have network connectivity because I can reboot the rig from the web UI.