Hi, I have AT&T U-Verse hooked up to my Sony Blu-Ray Player which is then connected to my 55" Vizio, all with HDMI. This setup was working okay (although getting the picture to show up was sometimes glitchy). So, about a month ago an AT&T Tech had to come replace our Home Gateway because it died while I was on a business trip. While they were there my wife mentioned some problems she was having with the DVR, so they replaced the AT&T U-Verse STB as well. Instead of verifying that everything was working with my existing setup, the tech connected the STB directly to the TV (bypassing my Sony player) and used this to verify that things were working. Unfortunately, when I got back from my business trip and connected everything back up the way that I had it (U-Verse STB --> Sony GTV --> Vizio TV) I started getting an error: "Unable to display video. (H1001)". This also included several steps to try to correct the problem such as unplugging and replugging in the HDMI cable, etc. None of these steps worked. So far I've tried the following in just about every combination: Unplug the STB Unplug the Sony GTV Box Unplug the TV Unplug the HDMI cables Replace the HDMI cables (3 different cables tried) Reboot the STB Reboot the Sony GTV Box Nothing seems to be solving the problem. So, at this point I'm thinking it must be the U-Verse STB since everything worked before they swapped it out. So, I called up AT&T to get them to come out and replace the box but instead they tried to forward me to their "Remote Support" group where I would have to PAY THEM to help me configure my "advanced setup". When I said this was unacceptable, I was forwarded to Customer Retention which is closed on Saturdays, so that just led to a recorded message. So I called AT&T back and this time when I explained that it broke after their tech made a change and explained my setup again, the 1st line support person told me that this configuration cannot work and is not supported by AT&T. She couldn't understand how it was possible that this ever worked, much lest that it worked fine from October of last year until the tech replaced the box last month. Anyway, before I call AT&T again on Monday to tell them to come pickup their box and shutoff my service I wanted to see if anyone else might have run into something similar and if they were able to find a solution? // Sean PS Any cluefull AT&T reps out there watching the forum that want to chime in here about Google TV and U-Verse? If I don't get this resolved I will be cutting the cord!