Anyone heard of E76? I bought a Premium Xbox near launch. Kept it and maybe did an update on the day i bought it, dont remember. Just got around to firmware hack a few days ago. It is a sammy ms25 and i put in 4.2b via extreme bootmaker and it worked fine. Played a few game backups and then decided to go online and do the fall update. It had an error after it finished and the tray was out. I powered down and rebooted, played a backup, and it worked. I went back online and it asked for another update. It took that update played a backup and went to sleep with internet unplugged from xbox. Now it is giving me E76, i might be mistaken but i thought i read E75 on the boot before that. If i have a backup in the drive it loads the world screen then goes to E76, lower right light blinking. If i do not have a disk in, it goes right to E76. I was able to bring the firmware back down to 3.3 and it still does the same thing. I have not tried leaving it at original firmware yet, that is next. Am i missing something really obvious here? Has anyone heard of E76? The forums say they do not know what it means. I am guessing that this is an offshoot of the E71 problem. Completely stumped.

Ready to go out and buy a new xbox360 core but i am afraid of bricking another one. I read in one forum that someone accidently updated there xbox 360 by plugging in the hard drive of an updated one. They said it just updated without asking.
It should be noted that i did my fall update during the time frame that microsoft was going to come out with a fix for the fall update but had not done so yet.
Well, first things first, try the original firmware and see what happens. We'll work from there.