QUOTE(Eddie_the_Hated @ Sep 14 2007, 02:50 PM)
I may be thinking of something totally different, however I belive that the E74 was thought to be a scaler-chip issue 90% of the time. Which means that sending it in to Microsoft would be your only option. However, if you've got a spare cable & confidence in your soldering skills, I'd try anything I could!
I received this error after doing the x-clamp mod. It was intially getting the rrod error and the xclamp fixed that. Then I got the e74 error after about a month and a half of hardcore gaming. took the 360 apart and loosened the gpu heatsync, turn it on, it worked so I snugged up the heat sync again and away she went. It's happened a few times since but adjusting the heat sync brings it back. I may try the cpu next time as this may be the cause as well.
Anyhow try that out and see how it goes.