>> From a user on XBH forums on xboxhacker.net:

I noticed nobody has posted the reasons for visual error codes so I figured I’d put out what I know. A lot of these errors can be the results of any number of problems, especially with something like E74. So take these with a grain of salt. The explanation “general hardware failure” is an acceptable description for most of these because you would have to specifically look at each board to see what went wrong, but this might help with a few trivial errors, or help people pinpoint problem areas. (more…)