Sector67 recently hosted an Xbox rework and BGA chip soldering class.
In Xbox 360s, the infamous “red ring of death” is often the result of a soldering failure by BGA-mounted graphics card.
A couple o’ BGAs.
Xbox graphics card mounted on a BGA.
Soldering a BGA is tricky business and cannot be done by hand, instead calling for the precision of a temperature controlled soldering machine.
The infrared BGA rework station for soldering is a Jovy Systems RE-7500 model.
The Jovy RE-7500 at work:
The wires held down by the yellow tape are thermocouples monitoring the temperature.
See those white specks? One of the graphics chips was dropped and splattered everywhere.
And here is a successful soldering of the BGA chip.