Hi, I bought my first Atv just 2 days ago. It came with the 4.1.1 ios version. I jailbroke it with greenpoison and installe xbmc with some great addons. Everything was ok until today. While in the menu of Nito TV it showed up that there was a new update. I guess it was for cydia. If I'm not wrong it was something like core-utils. Ayway I updated it and it asked me to restart. I did restart and I saw the apple logo on the screen for about 10 seconds. Then ATV should have started and the menus should have showed up at the moment but it didn't. It was trying to sync with TV's HDMI but it looked like it failed all the time and I always had black screen. Whenever I restart it I always get this. I decided to restore Apple TV to 4.1.1 original firmware. I downloaded the ispw file. Tried shift restore but I got 3194 error. Each time it was trying to communicate with Apple Server I was always getting this error. I launched tinyunbrella and started TSS server to get rid of that message. This time I didn't get that error. It started extracting the firmware. But when the message switched to Preparing Apple TV to update firmware it was always stuck. I tried many things. I plugged power cable, unplugged it, tried to update to 4.2.1 (4.3.1) and evet tried to update it to original IOS 5 just by clicking restore but it didn't work (This time I got an error 2005). I was always stuck in there. My computer is a PC. I tried the same thing at another windows laptop but nothing was changed. I thought maybe it could be from the cable but I could jailbreak the device without any problem. And the cable is not a bad one. It's Belkin. I don't know why the device went down after updating that core-utils thing. And I don't know what to do to restore it. I had these kind of problems with iphone sometime before but I could always find a solution. One last think I have in my mind is to try these on a Mac if I can find any around me. Other than that I don't know what to do. I hope you can give me an idea to try. Thanks.