You said you had tried BIND & EJECT. However did you have the flash drive inserted to reimage the XBox? I did this some time ago with mine after it refused to boot up and it did the trick. There are 2 image files, OSU2 and OSU1. OSU2 is ~1.9GB and is to be tried first, OSU1 is ~ 3GB and is the last resort to try. If neither of these 2 images work, not sure where you would go from there.
http://support.xbox.com/en-GB/xbox-o...sb-flash-drive