@Carl Thank you for the reply.  I'll give that a try and let you know the results.  One question: should the router be powered down and disconnected during this pricedure with the modem?

@Carbo 

Since you have Comcast, I'll assume you have Cable.

I have Spectrum, and I think the same applies to all cable companies.

Basically you will retain the SAME IP WAN Address, it will not change. It can be changed a few ways, but basically the ISP connects you to a 'box' that has a possible 'x' number of connection. However, there is never 'x' connected but less. So if you don't change what is connected to the end of the cable coming out of the wall (modem, or force a change, or the ISP changes the main box address) it will always be the same.

What you can do is check the ISP's modem. Usually an IP Address of 192.168.100.1 when entered into the address bar of a browser will get you to the modem. Some may require an UserID and Password. For an Arris modem the default of 'admin' as the USERID and either 'admin' or 'password' for the Password will get you in. Look at the Status or Event log looking for errors.

On the STATUS page you will see the UPTIME... and if it is recent, the modem might be rebooting. On the 'log' page you might find errors of some sort. Some are 'normal', but if there are ones when you lost signal, then it is the modem.

If you can, you could also as a test connect a PC direct connect to the modem and see if the PC loses connection as well.

@IrvSp  Thank you for that info.  Much appreciated.  I'm no techie, but from what I'm seeing after logging into my modem, (Netgear CM1100), the modem isn't the issue.    Under the Basic tab the status is listed as "Good". Uptime is at 258 hours, (so about 11 days).  Under the Advanced tab I found the logs and that's a whole 'nother story.  I might as well be looking at Mandarin.   I've attached a screenshot if you want to take a look.
Also, when the issue began popping up when I lost my internet connection I wired my laptop directly into the router and I regained immediate access to the internet.

Carbo wrote

Under the Advanced tab I found the logs and that's a whole 'nother story.  I might as well be looking at Mandarin.   I've attached a screenshot if you want to take a look.
Also, when the issue began popping up when I lost my internet connection I wired my laptop directly into the router and I regained immediate access to the internet.

@Carbo 

Well, the T3 timeouts could be a problem.

Might want to look here, 

https://pickmymodem.com/cable-modem-t3-and-t4-timeouts-error-messages-and-how-to-fix-them/

Not always a problem, but it can be common.

=================

Occurrence: Extremely common in the customer homes

Symptom: Will cause intermittent disconnections. If you see couple of them, it is fine. If you quite a few of them consecutively, then it will lead to disconnections.

=================

As you see, I have them too, but no dropouts.

A call to your ISP might be in order. They would be able to determine if this were normal or not.

Carbo wrote

Also, when the issue began popping up when I lost my internet connection I wired my laptop directly into the router and I regained immediate access to the internet.

So you are not probably losing Internet but WIRELESS signal...

By the way, there is a LEASE time for you IP WAN Address. Normally at 1/2 the time of the lease a request to get it is sent. Normally you get the same IP Address. Even if it were to change, you'd probably never know it. That answer was a cop-out. My old Netgear router (R7000 and R8000) did show the lease time, for me, 2 days...

A completely different thing. Many different causes. Could be the signal is too weak to stay connected. Interference, distance from router, even a problem with the OS or network adapter driver. Have you tried using the other SSID? Changing the Channel it is on?