LS300 LED Cycling?

I have an LS300 with all four LED lights cycling red-yellow-green one at a time in quick succession. I have about 40 of these things and I’ve never seen this before. Does anyone have experience or recommendations for this. I cannot connect to the LS300 via AirVantage, AceManager, or Ethernet cable directly from the computer. Is it toasted?

did you try resetting the device?