I just purchased a brand new ATV2 with firmware 4.3 (2557) with the full intentions of Jailbreaking it. Before i made the purchase i did tonnes of research and i made the leap. While i have never jailbroken something before, i do have a substantial amount of computer knowledge, so i’m not completely incapable… but right now i’m feeling useless. I started by downloading and installing tinyumbrella 5.00.12, most recent version of Seas0npass Version 0.7.8 (165) on my mac with the most recent itunes. I started by saving the SHSH files and unchecking the 2 cydia boxes in umbrella. I then went ahead and tried to jailbreak with seasonpass. It first started coming up with the error saying that this device was not able to be restored to that version. I also kept getting error 21, over and over again. i eventually reinstalled the 4.3 firmware to see what would happen and it was able to restore it. So this cancels out the cable issue that many of you talk about. I then tried the same thing using a windows xp computer. I have tried using snOwbreeze, pwnage tool, and ireb to help with the dfu. none the less i have tried everything that i have read in these forums to combat the 1600 error issue, the 3194 error, the 21 error. I have turned off all my security protocols and programs, i have made sure that my atv2 was in dfu, i have tried it unteathered without power cables and with power cables. as i already mentioned i unchecked the “set host to cydia on exit” and the other one. I have restarted the computers and have tried multiple usb cables. In terms of the USB cables they always pop up the itunes on install and are working to transfer data. Even after failed attempts i would plug the atv to my tv and the micro-usb and itunes logo would show up meaning that the atv was either corrupted (due to the restores not properly happening or for being stuck in restore mode) but i have been able to restore it back to the original 4.3 with out issues every time. So this is where i now stand.
So next on the to do list… well its still the first thing on the list, get the atv2 jailbroken… then buy and install the aTV flash black, and then live a happy life.
Any and all help would be appreciated. Without any exaggeration i have now put in about 20 hours of actual labour into getting the jailbreak to work, and only now am i resorting to asking for help.