The Xbox 360 Case is made of plastic and was originally made to be hard to open. However it can easy be removed :
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You need to remove this panel before lifting the front panel•Then remove both side pannels by inserting a small iron tool into the holes, and popping out the place holders
You now can lift up the upper part of the casing
To remove the border case, Remove 6 large screws from the down panel with a torx T10 screw driver.
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Downside of the metal casing
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Motherboard