So after two separate service visits from TWC that totaled about 8 hours, I am still without encrypted channel service on my new Roamio Pro on TWC in Los Angeles (I am however receiving unencrypted channels, which is basically just 2-13, 402-413). The current problem seems to be that the latest Cisco STA1520 tuning adapter I've received today is not communicating with the Roamio; no matter what order of bootup/USB connection hoops I jump through I either get a solid green light or a fast blinking green light on the TA. However in the Roamio settings menu, it never recognizes the TA, it just says No Tuning Adapter under the Tuning Adapter menu. I've done some searching on the forums here but haven't found anyone with this same problem. The Tuning Adapter is brand new and I just received it today, hooked it up, and spent 30 minutes on the phone with TWC TA support attempting to get it to work. During the previous two TWC tech support in-home visits, he tried two different tuning adapters (Motorola MTR700), and he eventually gave up because it would blink indefinitely as well. Interestingly, when he very first hooked up the tuning adapter, I got decrypted channels for about 10 seconds (TNTHD), and then it went blank and I get the V58 error message for every encrypted channel now. I also spent a good hour on the phone with TiVo tech support and conference called in TWC CableCard support to no avail. Each was blaming the other for the failure to decrypt my channels and get the TA to work. TWC said all the CC data looked right, however TiVo said that one of the settings was wrong, then TWC said that setting doesn't apply to Motorola CCs. I am also on my fourth M-Card, as the tech kept thinking that was the problem and went through several cards during his visits to try to resolve the problem (never changing out the Motorola TA). During the previous two visits, the TWC tech replaced all coax cable in my house and the line to my house from the pole, as well as had additional TWC folks come out and change some settings at the box on the telephone pole; IIRC they said the signal was too high and they changed it from 55 to 42 (sorry, they didn't give me much info besides that). I have a Motorola cable box in another room that works perfectly fine, as well as internet through TWC that is working perfectly fine. The tech checked the levels on all my cables with his equipment multiple times during his troubleshooting adventures. Currently, it appears that the M-Card is paired properly with the unit, as far as I can tell and what TWC says as well (though I don't trust them entirely). I previously had a TivoHD Series 3 with 2 S-Cards and NO tuning adapter that worked perfectly fine for several years. I can't explain how that worked without a TA other than it had been setup before they went SDV in Los Angeles and it retained it's ability to tune to those channels (?). My best educated guess at this point having read up on the forums briefly is that the channel map is screwed up on the Roamio and that is preventing it from communicating with the new TA? Or the firmware on the TA is not compatible with the Roamio? So here I am, waiting on another service call for a tech to come out tomorrow morning, however I have little faith that anything will get resolved. I tried to cover my entire setup in this post, but I probably missed some key pieces of information. Hopefully someone out there has some suggestions to try; at this point I think I'm just going to do a full wipe on the Roamio and start from scratch, since I am out of options and am really frustrated. Thanks for reading.