@Proud2BProud I got a new router in November BE6500 flavor from BB. After the router looked good and the Modem looked good, I called the cable company as a reboot of the router didn't fix the error initially only a reboot of the cable modem. They gave me a new coax and tweaked some settings on the signal from Spectrum, and the modem continued to say "online". The router was happy for over a day. Now red light occured on router again for no internet. Replaced cable from modem to router. Good again for about 12 hours. I have smart devices hooked up saying "no internet". I hooked up a PC and it works fine from the cable modem. Restarted the router and it was good for about 12 hours then fail again. It will go back if it fails again.

I worked with TPLINK support, and they referred me to engineers, to respond in 48 hours (they asked my router MAC address and my provider which I thought was weird). But I'd decided after the next failure (no internet) to return the router while under extended Holiday return policy at BB. I changed brands and have been solid for 23 hours. I didn't like that TPLINK has made the news recently (after my purchase) for security issues. Good luck to you.

The last suggestion before we called it a day/night with support, was to put another router in front of the TPLINK router to see if old router providing better/cleaner signal to new router. Unfortunately after I purchased the BE6500, I gave/installed the router at brother in law's house, 45 days ago so no spare router to do deeper testing for TPLINK tier 1.