Well, as of now. I have an apple TV with 4.2.1 (4.3) at home. I understand that this OS can be jailbroken untethered. I have been all but unsuccessful with either greenpoison or seasonpass. My main problem with season pass is that I do not have the SHSH blobs saved for this OS. Sadly I can't do anything about it as I bought it this week. Now, The only other option that doesn't require flashing the unit is greenpoison. But. After I do the procedure. No jailbreak. No nothing, no Blinking light. I have done this process over 50x literally. And all but fail. I've left it 20 minutes on after it finishes. Light will blink but nothing on display. Reboot, back to normal. Is there any other trick for someone that is, has been on the same boat as me? Or another suggestion I might try?