I have the RUCKUS wifi extenders for about 4 years. Currently televisions are freezing and indicating no internet connection. ISP says router is working good. All devices are connected to RUCKUS, its about 20 devices. Could this be the problem? I have the following version Ruckus R550 Indoor Wireless Access Point NO Subscription (901-R550-US01)..Is there any type of troubleshooting I can perform?