Lenovo ThinkCentre M90n-1 Hardware Maintenance Manual page 69

3. Remove the heat sink cover, if any. See "Heat sink cover" on page 57.
4. Remove the screw that secures the power adapter bracket to the wall mount bracket.
5. Remove the power adapter bracket from the wall mount bracket.
6. Remove the power cord from the power adapter. See "Power adapter and power cord" on page 55.
7. Remove the power adapter from the power adapter bracket.
8. Turn over the computer so that the bottom cover is facing up.
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Chapter 6 Hardware removal and installation