Answer:

Unplug AB-412 hub, start by unplugging all products from hub.  Start one at a time by plugging in, power on again, check for blinking.  Do this for all devices until a problem is found with one device.  Typically this is a short between power an a ground.  If it is back to normal, watch this closely as a surge from the power would have placed it in this state.

Recommendation: place power surge protector in line with the power supply