Chosen Solution
Roomba 650 ignores virtual wall, but docks OK. I have the VWs that have a two position switch - auto/off. I have tried new batteries in the VWs and even changed the sensor in the Roomba. When switched on the VWs blink about every 8 seconds. I have two of them. Could they both be bad? Update (08/08/2016) Yes, VW = virtual wall. The VWs that I have do not have a power button that can be pressed down. They are slide switches and have two settings - OFF and AUTO. I see no other way to reset them.
I have the same problem. I think is a led problem. If you have an other one, please record a video with the phone and look it you see the light of the led. thanks.
