I am having issues and not sure what might be the problem. For the past few weeks I get messages on my phone, tablet and TV that says my 5ghz connection has no internet and I switch to 2.4ghz and it connects to the internet. Later on I get the same error message on the 2.4ghz band and I switch to 5ghz and it connects to the internet. This goes back and forth daily and I am trying to determine if my router is faulty or the cable modem. Please help.