I am currently buying/selling ATV2s. I have one problem, I have jailbroaken at least 40 in the last two weeks, before entering DFU mode some need electric cable installed some only the usb cable. I can't figure it out. And one more thing at some jailbreaks iTunes gives me error 1602 or 1604 but still the ATV jailbreak is finished and it runs smoothly, any solution for this? Or what may be the problem. I already tried changing the cable , the usb port even the PC.