XBox 360 is rattling
Some people have been hearing a rattling noise (something loose) from inside the console then stripping the unit
and finding nothing wrong!
You may have something loose but if you do not find anything inside then it will be because of the following
reason.
The motherboard has a VERTICAL and HORIZONTAL sensor on the motherboard and it is this sensor causing the
rattling noise as when you move the console it also moves to detect the position!
You can see the sensor circled in red on the picture below
