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Changes to Step #2

Edit by johnsawyercjs

Edit declined by Alex Diaz-Kokaisl

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[* red] Remove the two 3.1 mm T5 Torx screws securing the I/O board to the logic board.
- [* orange] On some models, also removing the silver 3.5 mm T5 Torx screw from the heatsink can aid in I/O board removal.
+ [* orange] On some models, also removing the silver 3.5 mm T5 Torx screw from the end of the heatsink pipe can aid in I/O board removal.
[* black] Carefully lift the I/O board and remove it from the lower case.
+[* black] While the I/O board is removed, use a can of compressed air and a soft brush to remove any dust you find on it and in the location it's installed.