I’ve decided to create this post after experiencing so much trouble jailbreaking my ATV2 just because my cable was SHITTY!
My device was not recognized in iTunes (unless I plug the power cable which is wrong in DFU mode)
The restore with the patched Firmware was repeatedly failing with error codes 1600, 1601 or 1602…
I had a look on the forum and spotted a few comments that hinted that the cable might be the reason. Well it WAS the reason! I went to another shop, bought a stronger, less flimsy cable and BOOM! Jailbroken! In a SMOOTH!
I suspect that the problem is that during the restore in iTunes, the DFU mode get screwed up somehow if the cable is not good (or if you use the power cable in an attempt to “boost” the signal).
So here are the key successful hardware factors to ace your ATV2 jailbreak:
A good, strong, thick cable, if possible with the electromagnetic protection (see picture).
Avoid long cable, prefer short cable
Avoid flimsy or thin cable, prefer thicker solid cable
Your ATV2 MUST be detected in iTunes automatically when you plug it (without the power cable). If not detected, your cable is definitely WRONG.
All the best! :)