Well, performing another experiment. Flip flopped my WJ4 and J4 locations. J4 is now located at the bedroom Vizio TV that has issues with Initial startup of the day having black screen and sound. Will see how goes it in the morning. Maybe this TV will like a Joey 4 better than Wireless Joey 4. The WJ4 that was in bedroom is now out in my garage. WAP signal strength is only 23 to 29 but she is still working so far. Does anyone know how low the WAP signal strength can go before a WJ4 has issues?Unbelievable!!!! Day one after WJ4 replacement and my Vizio failed to start this morning. Had black screen and sound. Plugged HDMI cable into test TV and same thing. Pull the cord reboot got her going. There is something in that Vizio TV causing this issue after the nightly updates. Going to leave the HDMI connected to test TV for now.