Internet Connection Lost Once 2nd Router Added to Network

I am at a point of complete loss and frustration and absolutely cannot figure this out.
About 4 months ago, I decided to add a 2nd router to my home network.  I have a large house and was having connection issues in certain spots.  My set up is:
Cable Modem ---(ethernet)--> Airport Extreme --(ethernet)--> Time Capsule
I have the network set up as a single network (Time Capsule extends the network).  I followed all the Apple instructions and everything set up with ease and worked flawlessly.  I was able to confirm that devices would switch from the Extreme to the Time Capsule depending on location.  It was wonderful.  Wifi bliss in my home!
Yesterday morning, I showed that I was connected to my wifi network but I could not get any data.  Airport Utility showed Green Lights next to my 2 devices but an Orange light next to "Internet" with a status of Disconnected.  I assumed it was an issue on my ISP side and went through a modem reboot and some other steps before confirming that I did in fact have an internet connection (hard wired ethernet from modem to MBP).  I went through the same steps as before (after restores through the Airport Utility menu) and my wifi network comes back when the Airport Extreme is connected but as soon as the Time Capsule is connected, the Airport Utility shows that I am disconnected from the internet and I have no data transfer.
After hours of soft resets, hard resets, and factory resets including changing the name of the network and resetting/unplugging the cable modem I became convinced that the Airport Extreme was the culprit (I bought it "new" open box on ebay).  So I bought a brand new Airport Extreme and the same thing happened.  I tried various configurations including taking the Time Capsule out of the equation and going Airport Extreme to Airport Extreme and absolutely nothing works.  Bottom line: Once I add a 2nd hard wired router to extend my network, I lose my connection to the internet and it says "Disconnected" at the top point of the Airport Utility.  When I have a single router connected, everything works fine (I am using it right now).
Does anyone have any idea what would be causing this?  I did not do any updates or anything odd.  I just woke up one morning and something that worked for 4 months flawlessly is completely impossible to use.

I figured out the issue and resolved the problem.  The Airport Extreme had WAN in from the Cable Modem and LAN out to the Time Capsule and to my DirecTV Home Cinema kit.  I re-set up everything with all unnecessary LAN connections disconnected and it worked.  I plug in the DirecTV LAN line and it all goes down again.  It looks like the DirecTV Cinema device was frozen and causing the issue.  Once I pulled the plug and rebooted it, everything went back online.
I have no idea why a frozen DirecTV Cinema device would cause this problem but it was definitely the culprit.  Now I have an extra Airport Extreme.  Sigh.

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  • Internet Connection Sharing and NFS route problem?

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