No audio or video on OTA channels 22.x

[Engineer]

OK gurus, this one is driving me bonkers!

I am running Windows 8.1 Media Center with two HDHomeRun OTA tuners, have switched over to the Rovi EPG. Manually added/corrected the many missing/incorrect channels (thanks Rovi). And yet, I cannot get audio or video on channels 22.x (in my area of Chicago this is 22.1 through 22.7). I simply see a black screen, and the HDHomeRun tuners show a steady green LED as if all is well.

I am utilizing two dual tuners:
HDHR3-US Firmware: 20150604
HDHR4-2US Firmware: 20150826

HDHomeRun VIEW works fine on these channels.

What I have tried:

1. WMC - Tasks - Settings - TV - Guide - Edit Channels - Edit Sources
Verified available turners, correct Channel Number (in my area 24.x), Quality 100%
2. WMC - Tasks - Settings - TV - Guide - Add Missing Channels - Add DTV Channel
3. WMC - Tasks - Settings - TV - TV Signal - Digital TV Antenna Signal Strength
I receive 6 Green segments (maximum) on the channels.
4. Tune WMC to 22.7 (Retro TV in Chicago), bring up HDHomeRun Config GUI
Signal Strength % - 98
Signal Quality % - 90
Symbol Quality % - 100
5. Completely remove WMC and reinstall (clean registry and eHome directory)
6. Removed PlayReady

Any help would be GREATLY appreciated!