For crying out loud...some of you are really getting desperate here. This is nothing new. E74 has been a problem since xbox 360 has been released. Its not as common as RROD and one should easily get their xbox fixed for free by microsoft if they get E74 but GIVING IT RROD manually. There are videos on how to do that...
Below are the error codes for the 360...atleast it tells you whats wrong rather than just die.
Section 4 is flashing red
- Hardware Failure
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The Specific Type of hardware failure can be determined by the error code displayed on the screen.
If the screen is blank or you would like additional information follow the instructions for determining the secondary error code in the section below
E45: Unknown (possibly dashboard update related)
E64: DVD Drive Error.... DVD Timeout, Wrong firmware, dvd is without f/w chip, etc.
E65: DVD Drive Error.... DVD Timeout, Wrong firmware, dvd is without f/w chip, etc. This can also be caused by the tray not being fully closed on boot.
E66: DVD Drive Error: DVD model, or version does not match that of the version expected by the dashboard. OR the firmware version on the drive is older then the firmware version expected by the dashboard. Make sure the DVD drive is of the same version originally included with the console and that it is using either the original firmware included with the console or newer.
E67: Hard Drive Error... It could be a problem with the Hard Drive itself or a problem with the internal connection to the hard drive, Try removing the hard drive and playing without it
E68: Voltage Error... This error means that the Xbox 360 has insufficent power to function properly. This can be caused by an error in the hard drive or the fans that make them suck up too much power, it can also be caused if you have unnecessary accessories attached to the console like an external fan unit. Attempt to remove unnecessary accessories first, and then necessary components such as the hard drive and USB devices. If you have any case mods you may want to investigate those as well.
E69: Hard Drive Error... It could be a problem with the Hard Drive itself or a problem with the internal connection to the hard drive, Try removing the hard drive and playing without it
E71: possibly a dashboard update error, Check below in the "Console Reset Codes" for instructions. If that does not work there is no other solution and the console must be sent back to MS for repair.
E72: Error with the NAND flash
E73: General Hardware Error: Ethernet port... this error is caused by a problem with the Ethernet port.
E74: There is high chance it's a scaler chip problem (the "ANA" or "HANA" chip near the AV cable connection) it can also be caused by a faulty AV cable so check that first. In some cases it is a problem with the GPU and may be repairable by doing the x-clamp replacement (see error 0102)
E76: This error deals with the Ethernet port's controller chip, a dead chip may not cause the error but removing the Ethernet controller chip does, it may also be caused by other Ethernet related problems.
E79: Hard Drive Error... It could be a problem with the Hard Drive itself or a problem with the internal connection to the hard drive, Try removing the hard drive and playing without it.
According to tmbinc: E79 is the error code if xam.xex could not be started, i.e. probably a file system corruption.
E80: Wrong LDV version in NAND Flash. This is in new dashboard. You have the update but haven't R3T6 resistor. You can:
-Downgrade to old dashboard, solder back the resistor and then update your xbox
-If you have CPU Key, get current NAND Flash image and fix LDV (just add 1 up to latest kernel). (See error 1100)
