Is the individual WiFi light supposed to be on at all times? Mine will not come on. It blinks 4 times quickly then goes out. I cannot connect my device wirelessly. Anyone have an answer or has this happened to you and how did you resolve? Is it a bad router/modem?
It could be defective. Try resetting it back to factory defaults. This can sometimes clear up some weird problems. If still no joy, call in and have Comcast place it in to "bridge" mode so that it acts as any other plain vanilla cable modem and then you use your own high quality wireless capable router with it.
Use this number to reach the right people for the job; 1-800-363-2416.