If there is E74 error message on your xbox 360 game console, the ANA chip is not working any more. First ,you need to try tightening or replacing the heat sinks that are supposed to cool the chip, but if the error stil exist, you may need to replace the chip.
Below are the steps for your reference:
9.Spread solder balls over the bga stencil, making sure to cover every hole.
10.Heat the solder balls until it is molten. Let it cool and then remove the stencil.
11 .Release the chip from the vice and place it in position on the motherboard.
12 . Heat the chip in its position on the motherboard for about 20 seconds or until it slides into place.
13. Above are the general steps, and there maybe missing some details, if you have any good idea or suggestion, please feel free to let me know.