Microsoft Xbox Repair Manual page 28

Step 6 - Eleven screws on the motherboard
Remove them all and be careful not to scratch the surface of the board with the driver.
Step 7 - Board removal
You will need to disconnect the yellow wires coming from the fan, power and reset switches and
also the connections to the USB game controller ports, the USB daughter board itself can be left
in place or removed. To remove the mother board lift the front to a 25 degree angle as shown in
the picture it can then be pulled forward and removed.
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