After powering off, pressing the reset and Reset IP button a bCX1 controller still will not start up. CPU does not flash and controller will not respond to a ping.
The controller is connected to an Ethernet network that is in a broadcast storm condition.
Disconnect the Ethernet cable from the controller and it will start up correctly.
On a very busy network or under a broadcast storm condition the controller will protect itself as detailed in Lessons Learned Article #6893.
This scenario can occur if a patch lead is inadvertently looped back onto the same Switch/ Router.